{"id":417,"date":"2024-10-23T12:20:30","date_gmt":"2024-10-23T03:20:30","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=417"},"modified":"2025-03-24T08:53:21","modified_gmt":"2025-03-23T23:53:21","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91java-trim%e3%81%ae%e3%81%99%e3%81%b9%e3%81%a6%ef%bc%9a%e4%bd%bf%e3%81%84%e6%96%b9%e3%83%bb%e6%b3%a8%e6%84%8f%e7%82%b9%e3%83%bb%e4%bb%a3%e6%9b%bf%e6%89%8b","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=417","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Java trim\u306e\u3059\u3079\u3066\uff1a\u4f7f\u3044\u65b9\u30fb\u6ce8\u610f\u70b9\u30fb\u4ee3\u66ff\u624b\u6bb5\u3092\u8a73\u3057\u304f\u89e3\u8aac"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">1. \u306f\u3058\u3081\u306b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">Java trim\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u306a\u305ctrim\u30e1\u30bd\u30c3\u30c9\u304c\u91cd\u8981\u304b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">2. Java trim\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">trim\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-5\">trim\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3068\u52d5\u4f5c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u57fa\u672c\u60c5\u5831<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">3. trim\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u6587\u5b57\u5217\u306e\u524d\u5f8c\u306e\u30b9\u30da\u30fc\u30b9\u3092\u524a\u9664\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-11\">\u7279\u5b9a\u306e\u6587\u5b57\u3092\u524a\u9664\u3059\u308b\uff08trim11\u306a\u3069\uff09<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u6587\u5b57\u5217\u306e\u9014\u4e2d\u306e\u30b9\u30da\u30fc\u30b9\u3092\u51e6\u7406\u3059\u308b<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">4. trim\u30e1\u30bd\u30c3\u30c9\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">null\u30dd\u30a4\u30f3\u30bf\u4f8b\u5916\u306e\u56de\u907f\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-23\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805<\/a>      <\/li>      <li>        <a href=\"#i-26\">\u56fd\u969b\u5316\u5bfe\u5fdc\u3067\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-29\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-30\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-31\">5. trim\u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u66ff\u624b\u6bb5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-32\">1. strip()\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/a>      <\/li>      <li>        <a href=\"#i-36\">2. replaceAll()\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-39\">3. Apache Commons\u306eStringUtils<\/a>      <\/li>      <li>        <a href=\"#i-42\">4. \u30ab\u30b9\u30bf\u30e0\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-44\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-45\">\u4f7f\u7528\u30b7\u30fc\u30f3\u306e\u6bd4\u8f03<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-46\">6. \u5b9f\u8df5\u7684\u306atrim\u306e\u4f7f\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-47\">1. \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-50\">2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a<\/a>      <\/li>      <li>        <a href=\"#i-52\">3. \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c<\/a>      <\/li>      <li>        <a href=\"#i-54\">4. trim\u30e1\u30bd\u30c3\u30c9\u3068\u4ee3\u66ff\u624b\u6bb5\u306e\u9078\u629e\u57fa\u6e96<\/a>      <\/li>      <li>        <a href=\"#i-58\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-61\">6. \u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u8ab2\u984c\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-65\">7. \u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-66\">trim\u30e1\u30bd\u30c3\u30c9\u306e\u307e\u3068\u3081<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-67\">\u6587\u5b57\u5217\u51e6\u7406\u306e\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">1. \u306f\u3058\u3081\u306b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6587\u5b57\u5217\u306e\u64cd\u4f5c\u306f\u975e\u5e38\u306b\u4e00\u822c\u7684\u304b\u3064\u91cd\u8981\u306a\u30bf\u30b9\u30af\u3067\u3059\u3002\u305d\u306e\u4e2d\u3067\u3082\u3001<code>trim()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u6587\u5b57\u5217\u51e6\u7406\u306e\u57fa\u672c\u7684\u304b\u3064\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3068\u3057\u3066\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Java <code>trim()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3001\u91cd\u8981\u6027\u3001\u305d\u3057\u3066\u5fdc\u7528\u4f8b\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">Java trim\u30e1\u30bd\u30c3\u30c9\u3068\u306f<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<p><code>trim()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001Java\u306e<code>String<\/code>\u30af\u30e9\u30b9\u306b\u5c5e\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3001\u6587\u5b57\u5217\u306e\u5148\u982d\u3068\u672b\u5c3e\u306b\u3042\u308b\u7a7a\u767d\u6587\u5b57\uff08\u30b9\u30da\u30fc\u30b9\u3001\u30bf\u30d6\u3001\u6539\u884c\u306a\u3069\uff09\u3092\u524a\u9664\u3059\u308b\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u304c\u3001\u591a\u304f\u306e\u5834\u9762\u3067\u5f79\u7acb\u3064\u4fbf\u5229\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<p>\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"  Hello, World!  \";\nString trimmedText = text.trim();\nSystem.out.println(trimmedText); \/\/ \u51fa\u529b: \"Hello, World!\"<\/pre>\n\n\n<div id=\"sgb-css-id-6\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u306a\u305ctrim\u30e1\u30bd\u30c3\u30c9\u304c\u91cd\u8981\u304b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<p><code>trim()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u91cd\u8981\u6027\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u9855\u8457\u306b\u73fe\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><code>trim() <\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u5229\u7528\u30b7\u30fc\u30f3<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-8\">\n<li><strong>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406<\/strong>\uff1a \u30d5\u30a9\u30fc\u30e0\u3084\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u304b\u3089\u306e\u5165\u529b\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u610f\u56f3\u305b\u305a\u7a7a\u767d\u3092\u5165\u308c\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<code>trim()<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u4e0d\u8981\u306a\u7a7a\u767d\u3092\u7c21\u5358\u306b\u9664\u53bb\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c<\/strong>\uff1a SQL\u30af\u30a8\u30ea\u306e\u4f5c\u6210\u6642\u3084\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u53d6\u5f97\u7d50\u679c\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u3001\u4f59\u5206\u306a\u7a7a\u767d\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<li><strong>\u6587\u5b57\u5217\u6bd4\u8f03<\/strong>\uff1a \u7a7a\u767d\u306e\u6709\u7121\u3067\u6587\u5b57\u5217\u304c\u7570\u306a\u308b\u3068\u5224\u5b9a\u3055\u308c\u3066\u3057\u307e\u3046\u554f\u984c\u3092\u3001<code>trim()<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7<\/strong>\uff1a \u30d5\u30a1\u30a4\u30eb\u304b\u3089\u8aad\u307f\u8fbc\u3093\u3060\u30c7\u30fc\u30bf\u3084\u5916\u90e8API\u304b\u3089\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u306a\u3069\u3001\u5916\u90e8\u30bd\u30fc\u30b9\u304b\u3089\u306e\u30c7\u30fc\u30bf\u3092\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3059\u308b\u969b\u306b\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-11\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u52a0\u3048\u3001<code>trim()<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3001\u6ce8\u610f\u70b9\u3001\u305d\u3057\u3066\u4ee3\u66ff\u624b\u6bb5\u306b\u3064\u3044\u3066\u3082\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002Java\u3067\u306e\u6587\u5b57\u5217\u51e6\u7406\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306e\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<h2 class=\"wp-block-heading\" id=\"i-3\">2. Java trim\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<p>Java \u306e <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u57fa\u672c\u7684\u306a\u30c4\u30fc\u30eb\u3068\u3057\u3066\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u3001\u305d\u306e\u52d5\u4f5c\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\n<h3 class=\"wp-block-heading\" id=\"i-4\">trim\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f <code>String<\/code> \u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String trimmedString = originalString.trim();<\/pre>\n\n\n<div id=\"sgb-css-id-16\">\n<p>\u4ee5\u4e0b\u306b\u3001\u7c21\u5358\u306a\u4f7f\u7528\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String original = \"  Hello, World!  \";\nString trimmed = original.trim();\nSystem.out.println(\"Original: '\" + original + \"'\");\nSystem.out.println(\"Trimmed : '\" + trimmed + \"'\");<\/pre>\n\n\n<div id=\"sgb-css-id-17\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306e\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Original: '  Hello, World!  '\nTrimmed : 'Hello, World!'<\/pre>\n\n\n<div id=\"sgb-css-id-18\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">trim\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3068\u52d5\u4f5c<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u52d5\u4f5c\u3068\u623b\u308a\u5024\u306b\u3064\u3044\u3066\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\">\n<li><strong>\u65b0\u3057\u3044String\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059<\/strong>\uff1a<br><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5143\u306e\u6587\u5b57\u5217\u3092\u5909\u66f4\u305b\u305a\u3001\u65b0\u3057\u3044 <code>String<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u308c\u306f Java \u306e\u6587\u5b57\u5217\u304c\u4e0d\u5909\uff08immutable\uff09\u3067\u3042\u308b\u3068\u3044\u3046\u7279\u6027\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5143\u306e\u6587\u5b57\u5217\u306f\u5909\u66f4\u3055\u308c\u306a\u3044<\/strong>\uff1a<br>\u5143\u306e\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u8907\u6570\u306e\u7b87\u6240\u3067\u540c\u3058\u6587\u5b57\u5217\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u3001\u4e88\u671f\u305b\u306c\u526f\u4f5c\u7528\u3092\u9632\u3050\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002<\/li>\n\n\n\n<li><strong>\u7a7a\u767d\u304c\u306a\u3044\u5834\u5408\u306e\u52d5\u4f5c<\/strong>\uff1a<br>\u6587\u5b57\u5217\u306e\u524d\u5f8c\u306b\u7a7a\u767d\u6587\u5b57\u304c\u306a\u3044\u5834\u5408\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u5143\u306e\u6587\u5b57\u5217\u3068\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u4e0d\u5fc5\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u6700\u9069\u5316\u3067\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String noWhitespace = \"Hello\";\nString trimmed = noWhitespace.trim();\nSystem.out.println(noWhitespace == trimmed);  \/\/ true \u3092\u51fa\u529b<\/pre>\n\n\n<div id=\"sgb-css-id-20\">\n<p>4. <strong>\u524a\u9664\u3055\u308c\u308b\u7a7a\u767d\u6587\u5b57<\/strong>\uff1a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<p>  <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u4ee5\u4e0b\u306e\u7a2e\u985e\u306e\u7a7a\u767d\u6587\u5b57\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-22\">\n<li>\u534a\u89d2\u30b9\u30da\u30fc\u30b9 (U+0020)<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<li>\u30bf\u30d6 (U+0009)<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<li>\u6539\u884c (U+000A)<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<li>\u30ad\u30e3\u30ea\u30c3\u30b8\u30ea\u30bf\u30fc\u30f3 (U+000D)<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-26\">\n<li>\u305d\u306e\u4ed6\u306e Unicode \u3067\u5b9a\u7fa9\u3055\u308c\u305f\u7a7a\u767d\u6587\u5b57 \u305f\u3060\u3057\u3001\u5168\u89d2\u30b9\u30da\u30fc\u30b9\uff08U+3000\uff09\u306f\u524a\u9664\u3055\u308c\u306a\u3044\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-27\">\n<p>5. <strong><strong>\u6587\u5b57\u5217\u306e\u4e2d\u9593\u306e\u7a7a\u767d\u306f\u4fdd\u6301\u3055\u308c\u308b<\/strong>\uff1a<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<p>  <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u6587\u5b57\u5217\u306e\u5148\u982d\u3068\u672b\u5c3e\u306e\u7a7a\u767d\u306e\u307f\u3092\u524a\u9664\u3057\u3001\u4e2d\u9593\u306e\u7a7a\u767d\u306f\u305d\u306e\u307e\u307e\u4fdd\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"  Hello   World!  \";\nString trimmed = text.trim();\nSystem.out.println(\"Trimmed: '\" + trimmed + \"'\");  \/\/ \u51fa\u529b: 'Hello   World!'<\/pre>\n\n\n<div id=\"sgb-css-id-29\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u57fa\u672c\u60c5\u5831<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-30\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u7684\u306a\u60c5\u5831\u3092\u62bc\u3055\u3048\u3066\u304a\u304f\u3053\u3068\u306f\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-31\">\n<li><strong>\u6642\u9593\u8a08\u7b97\u91cf<\/strong>\uff1aO(n)\u3001\u3053\u3053\u3067 n \u306f\u6587\u5b57\u5217\u306e\u9577\u3055\u3067\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u306f\u6587\u5b57\u5217\u3092\u4e00\u5ea6\u8d70\u67fb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u7a7a\u9593\u8a08\u7b97\u91cf<\/strong>\uff1a\u6700\u60aa\u306e\u5834\u5408 O(n) \u3067\u3059\u304c\u3001\u591a\u304f\u306e\u5834\u5408\u306f\u5143\u306e\u6587\u5b57\u5217\u3092\u518d\u5229\u7528\u3059\u308b\u305f\u3081\u3001\u8ffd\u52a0\u306e\u7a7a\u9593\u3092\u5fc5\u8981\u3068\u3057\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-32\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u6bd4\u8f03\u7684\u8efd\u91cf\u306a\u64cd\u4f5c\u3067\u3059\u304c\u3001\u975e\u5e38\u306b\u9577\u3044\u6587\u5b57\u5217\u3084\u3001\u983b\u7e41\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u5834\u5408\u306b\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<p>\u4ee5\u4e0a\u304c Java \u306e <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u52d5\u4f5c\u306b\u3064\u3044\u3066\u306e\u89e3\u8aac\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u5fdc\u7528\u4f8b\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<h2 class=\"wp-block-heading\" id=\"i-7\">3. trim\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-35\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u5fdc\u7528\u4f8b\u3068\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u69d8\u3005\u306a\u6587\u5b57\u5217\u51e6\u7406\u30bf\u30b9\u30af\u3092\u52b9\u7387\u7684\u306b\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u6587\u5b57\u5217\u306e\u524d\u5f8c\u306e\u30b9\u30da\u30fc\u30b9\u3092\u524a\u9664\u3059\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-37\">\n<h4 class=\"wp-block-heading\" id=\"i-9\">\u8907\u6570\u884c\u30c6\u30ad\u30b9\u30c8\u306e\u51e6\u7406<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-38\">\n<p>\u8907\u6570\u884c\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u5404\u884c\u306b\u5bfe\u3057\u3066 <code>trim()<\/code> \u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4e0d\u8981\u306a\u7a7a\u767d\u3092\u52b9\u679c\u7684\u306b\u524a\u9664\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String multilineText = \"  Line 1  \\n  Line 2  \\n  Line 3  \";\nString[] lines = multilineText.split(\"\\n\");\nStringBuilder result = new StringBuilder();\n\nfor (String line : lines) {\n    result.append(line.trim()).append(\"\\n\");\n}\n\nSystem.out.println(result.toString());<\/pre>\n\n\n<div id=\"sgb-css-id-39\">\n<p><strong>\u51fa\u529b<\/strong>\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Line 1\nLine 2\nLine 3<\/pre>\n\n\n<div id=\"sgb-css-id-40\">\n<h4 class=\"wp-block-heading\" id=\"i-10\">\u6587\u5b57\u5217\u914d\u5217\u306e\u51e6\u7406<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<p>\u6587\u5b57\u5217\u306e\u914d\u5217\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u3082 <code>trim()<\/code> \u306f\u6709\u7528\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String[] words = {\"  apple  \", \"banana  \", \"  cherry\"};\nString[] trimmedWords = Arrays.stream(words)\n                              .map(String::trim)\n                              .toArray(String[]::new);\n\nSystem.out.println(Arrays.toString(trimmedWords));<\/pre>\n\n\n<div id=\"sgb-css-id-42\">\n<p><strong>\u51fa\u529b<\/strong>\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">[apple, banana, cherry]<\/pre>\n\n\n<div id=\"sgb-css-id-43\">\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u7279\u5b9a\u306e\u6587\u5b57\u3092\u524a\u9664\u3059\u308b\uff08trim11\u306a\u3069\uff09<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-44\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u7a7a\u767d\u6587\u5b57\u3092\u524a\u9664\u3057\u307e\u3059\u304c\u3001\u7279\u5b9a\u306e\u6587\u5b57\u3092\u524a\u9664\u3057\u305f\u3044\u5834\u5408\u306f\u30ab\u30b9\u30bf\u30e0\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public static String customTrim(String str, char trimChar) {\n    int start = 0, end = str.length() - 1;\n    while (start &lt;= end &amp;&amp; str.charAt(start) == trimChar) start++;\n    while (end &gt; start &amp;&amp; str.charAt(end) == trimChar) end--;\n    return str.substring(start, end + 1);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nString text = \"11Hello World11\";\nSystem.out.println(customTrim(text, '1')); \/\/ \u51fa\u529b: Hello World<\/pre>\n\n\n<div id=\"sgb-css-id-45\">\n<p>\u307e\u305f\u306f\u3001\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"11Hello World11\";\nString trimmed = text.replaceAll(\"^1+|1+$\", \"\");\nSystem.out.println(trimmed); \/\/ \u51fa\u529b: Hello World<\/pre>\n\n\n<div id=\"sgb-css-id-46\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u6587\u5b57\u5217\u306e\u9014\u4e2d\u306e\u30b9\u30da\u30fc\u30b9\u3092\u51e6\u7406\u3059\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p><code>trim()<\/code> \u306f\u6587\u5b57\u5217\u306e\u9014\u4e2d\u306e\u30b9\u30da\u30fc\u30b9\u306f\u51e6\u7406\u3057\u307e\u305b\u3093\u304c\u3001\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<h4 class=\"wp-block-heading\" id=\"i-13\">replaceAll()\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"  Hello   World  \";\nString processed = text.trim().replaceAll(\"\\\\s+\", \" \");\nSystem.out.println(processed); \/\/ \u51fa\u529b: Hello World<\/pre>\n\n\n<div id=\"sgb-css-id-49\">\n<h4 class=\"wp-block-heading\" id=\"i-14\">StringTokenizer\u30af\u30e9\u30b9\u306e\u6d3b\u7528<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"  Hello   World  \";\nStringTokenizer tokenizer = new StringTokenizer(text);\nStringBuilder result = new StringBuilder();\n\nwhile (tokenizer.hasMoreTokens()) {\n    result.append(tokenizer.nextToken()).append(\" \");\n}\n\nSystem.out.println(result.toString().trim()); \/\/ \u51fa\u529b: Hello World<\/pre>\n\n\n<div id=\"sgb-css-id-50\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6ce8\u610f\u70b9<\/h3>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-51\">\n<li>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u969b\u306f\u3001<code>trim()<\/code> \u306e\u547c\u3073\u51fa\u3057\u56de\u6570\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u53ef\u80fd\u3067\u3042\u308c\u3070\u3001\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u3084\u4e26\u5217\u51e6\u7406\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">List&lt;String&gt; largeList = \/* \u5927\u91cf\u306e\u6587\u5b57\u5217\u30c7\u30fc\u30bf *\/;\nList&lt;String&gt; trimmedList = largeList.parallelStream()\n                                    .map(String::trim)\n                                    .collect(Collectors.toList());<\/pre>\n\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-52\">\n<li><code>trim()<\/code> \u306f\u65b0\u3057\u3044 <code>String<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u7279\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ab\u30b9\u30bf\u30e0\u306e trim \u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-53\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u306e\u6d3b\u7528\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<ol class=\"wp-block-list is-style-sango-list-simple\">\n<li><strong>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong><\/li>\n<\/ol>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public boolean isValidUsername(String username) {\n    String trimmedUsername = username.trim();\n    return !trimmedUsername.isEmpty() &amp;&amp; trimmedUsername.length() &gt;= 3;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-55\">\n<ol start=\"2\" class=\"wp-block-list is-style-sango-list-simple\">\n<li><strong>CSV\u30d5\u30a1\u30a4\u30eb\u306e\u51e6\u7406<\/strong><\/li>\n<\/ol>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String csvLine = \" John , Doe , 30 , New York \";\nString[] fields = Arrays.stream(csvLine.split(\",\"))\n                        .map(String::trim)\n                        .toArray(String[]::new);\nSystem.out.println(Arrays.toString(fields));\n\/\/ \u51fa\u529b: [John, Doe, 30, New York]<\/pre>\n\n\n<div id=\"sgb-css-id-57\">\n<ol start=\"3\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-56\">\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/div><\/ol>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public List&lt;User&gt; searchUsers(String keyword) {\n    String trimmedKeyword = keyword.trim();\n    if (trimmedKeyword.isEmpty()) {\n        return Collections.emptyList();\n    }\n    return userRepository.findByNameContaining(trimmedKeyword);\n}<\/pre>\n\n\n<div id=\"sgb-css-id-58\">\n<p>\u4ee5\u4e0a\u304c <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528\u4f8b\u3067\u3059\u3002\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u52a0\u3048\u3066\u3001\u3053\u308c\u3089\u306e\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-59\">\n<h2 class=\"wp-block-heading\" id=\"i-17\">4. trim\u30e1\u30bd\u30c3\u30c9\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-60\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3059\u304c\u3001\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u4e3b\u306a\u6ce8\u610f\u70b9\u3068\u3001\u305d\u308c\u3089\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-61\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">null\u30dd\u30a4\u30f3\u30bf\u4f8b\u5916\u306e\u56de\u907f\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u969b\u3001\u6700\u3082\u4e00\u822c\u7684\u306a\u554f\u984c\u306e1\u3064\u306f <code>NullPointerException<\/code> \u3067\u3059\u3002\u3053\u308c\u306f\u3001null \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066 <code>trim()<\/code> \u3092\u547c\u3073\u51fa\u305d\u3046\u3068\u3057\u305f\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String input = null;\nString trimmed = input.trim(); \/\/ NullPointerException \u304c\u767a\u751f\u3057\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-64\">\n<h4 class=\"wp-block-heading\" id=\"i-20\">\u6539\u5584\u7b561\uff1a null \u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u65bd<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String input = null;\nString trimmed = (input != null) ? input.trim() : \"\";<\/pre>\n\n\n<div id=\"sgb-css-id-65\">\n<h4 class=\"wp-block-heading\" id=\"i-21\">\u6539\u5584\u7b562\uff1a Apache Commons Lang \u306e\u4f7f\u7528<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-66\">\n<p>Apache Commons Lang \u30e9\u30a4\u30d6\u30e9\u30ea\u306e <code>StringUtils.trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001null \u5b89\u5168\u306a trim \u64cd\u4f5c\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.apache.commons.lang3.StringUtils;\n\nString input = null;\nString trimmed = StringUtils.trim(input); \/\/ null \u3092\u8fd4\u3057\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-67\">\n<h4 class=\"wp-block-heading\" id=\"i-22\">\u6539\u5584\u7b563\uff1a Java 8\u4ee5\u964d\u306e Optional \u30af\u30e9\u30b9\u306e\u6d3b\u7528<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String input = null;\nString trimmed = Optional.ofNullable(input)\n                         .map(String::trim)\n                         .orElse(\"\");<\/pre>\n\n\n<div id=\"sgb-css-id-68\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u95a2\u3059\u308b\u8003\u616e\u4e8b\u9805<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<p>\u5927\u91cf\u306e\u6587\u5b57\u5217\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001<code>trim()<\/code> \u306e\u4f7f\u7528\u65b9\u6cd5\u306b\u3088\u3063\u3066\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-70\">\n<h4 class=\"wp-block-heading\" id=\"i-24\">\u975e\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">List&lt;String&gt; largeList = \/* \u5927\u91cf\u306e\u6587\u5b57\u5217\u30c7\u30fc\u30bf *\/;\nfor (int i = 0; i &lt; largeList.size(); i++) {\n    largeList.set(i, largeList.get(i).trim());\n}<\/pre>\n\n\n<div id=\"sgb-css-id-71\">\n<h4 class=\"wp-block-heading\" id=\"i-25\">\u6539\u5584\u7b56\uff1a \u30b9\u30c8\u30ea\u30fc\u30e0\u3068\u4e26\u5217\u51e6\u7406\u306e\u6d3b\u7528<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">List&lt;String&gt; largeList = \/* \u5927\u91cf\u306e\u6587\u5b57\u5217\u30c7\u30fc\u30bf *\/;\nList&lt;String&gt; trimmedList = largeList.parallelStream()\n                                    .map(String::trim)\n                                    .collect(Collectors.toList());<\/pre>\n\n\n<div id=\"sgb-css-id-72\">\n<p>\u3053\u306e\u65b9\u6cd5\u3067\u306f\u3001\u30de\u30eb\u30c1\u30b3\u30a2\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3057\u3001\u51e6\u7406\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-73\">\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u56fd\u969b\u5316\u5bfe\u5fdc\u3067\u306e\u6ce8\u610f\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f Unicode \u7a7a\u767d\u6587\u5b57\u3092\u51e6\u7406\u3057\u307e\u3059\u304c\u3001\u5168\u89d2\u30b9\u30da\u30fc\u30b9\uff08U+3000\uff09\u306a\u3069\u306e\u7279\u6b8a\u306a\u7a7a\u767d\u6587\u5b57\u306f\u524a\u9664\u3057\u307e\u305b\u3093\u3002\u56fd\u969b\u5316\u5bfe\u5fdc\u3092\u884c\u3046\u5834\u5408\u306f\u3001\u3053\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-75\">\n<h4 class=\"wp-block-heading\" id=\"i-27\">\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String japaneseSample = \"\u3000\u3053\u3093\u306b\u3061\u306f\u3000\"; \/\/ \u5168\u89d2\u30b9\u30da\u30fc\u30b9\u3092\u4f7f\u7528\nSystem.out.println(japaneseSample.trim()); \/\/ \"\u3000\u3053\u3093\u306b\u3061\u306f\u3000\" \u3068\u51fa\u529b\u3055\u308c\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-76\">\n<h4 class=\"wp-block-heading\" id=\"i-28\">\u6539\u5584\u7b56\uff1a \u30ab\u30b9\u30bf\u30e0trim\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public static String trimAllWhitespace(String str) {\n    if (str == null) return null;\n    return str.replaceAll(\"^\\\\s+|\\\\s+$\", \"\");\n}\n\nString japaneseSample = \"\u3000\u3053\u3093\u306b\u3061\u306f\u3000\";\nSystem.out.println(trimAllWhitespace(japaneseSample)); \/\/ \"\u3053\u3093\u306b\u3061\u306f\" \u3068\u51fa\u529b\u3055\u308c\u307e\u3059<\/pre>\n\n\n<div id=\"sgb-css-id-77\">\n<h3 class=\"wp-block-heading\" id=\"i-29\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-78\">\n<p>1. <strong>\u5165\u529b\u5024\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-79\">\n<li><code>trim()<\/code> \u3092\u4f7f\u7528\u3059\u308b\u524d\u306b\u3001\u5e38\u306b null \u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u304b\u3001null \u5b89\u5168\u306a\u65b9\u6cd5\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-80\">\n<p>2. <strong>\u4e00\u8cab\u3057\u305f\u4f7f\u7528\u65b9\u6cd5\u306e\u63a1\u7528<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-81\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53\u3067 <code>trim()<\/code> \u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u7d71\u4e00\u3057\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u3066\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/div><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   public class StringUtils {\n       public static String safeTrim(String str) {\n           return str == null ? \"\" : str.trim();\n       }\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-82\">\n<p>3. <strong>\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u306e\u4f5c\u6210<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-83\">\n<li><code>trim()<\/code> \u306e\u4f7f\u7528\u306b\u95a2\u3057\u3066\u3001\u69d8\u3005\u306a\u30b1\u30fc\u30b9\u3092\u30ab\u30d0\u30fc\u3059\u308b\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/div><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   @Test\n   public void testSafeTrim() {\n       assertEquals(\"\", StringUtils.safeTrim(null));\n       assertEquals(\"\", StringUtils.safeTrim(\"  \"));\n       assertEquals(\"hello\", StringUtils.safeTrim(\"  hello  \"));\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-84\">\n<p>4. <strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-85\">\n<li>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u4e26\u5217\u51e6\u7406\u3084\u30b9\u30c8\u30ea\u30fc\u30e0\u64cd\u4f5c\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-86\">\n<p>5. <strong>\u56fd\u969b\u5316\u5bfe\u5fdc<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-87\">\n<li>\u56fd\u969b\u5316\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u306e trim \u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3084\u3001\u9069\u5207\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-88\">\n<h3 class=\"wp-block-heading\" id=\"i-30\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u306b\u95a2\u3059\u308b\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3092\u884c\u3046\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u306e\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-90\">\n<li>null \u30c1\u30a7\u30c3\u30af\u304c\u9069\u5207\u306b\u884c\u308f\u308c\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\n<li>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u6642\u306b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5\u306b\u306a\u3063\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<li>\u56fd\u969b\u5316\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u7b87\u6240\u3067\u3001\u9069\u5207\u306a trim \u51e6\u7406\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<li><code>trim()<\/code> \u306e\u4f7f\u7528\u65b9\u6cd5\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u304b<\/li>\n<\/div>\n\n\n<li>\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u304c\u5341\u5206\u306b\u30ab\u30d0\u30fc\u3055\u308c\u3066\u3044\u308b\u304b<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<p>\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u3088\u308a\u52b9\u679c\u7684\u304b\u3064\u5b89\u5168\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u66ff\u624b\u6bb5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<h2 class=\"wp-block-heading\" id=\"i-31\">5. trim\u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u66ff\u624b\u6bb5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u6587\u5b57\u5217\u306e\u7a7a\u767d\u3092\u9664\u53bb\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u304c\u3001\u7279\u5b9a\u306e\u72b6\u6cc1\u3067\u306f\u4ed6\u306e\u624b\u6cd5\u304c\u3088\u308a\u9069\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u4ee3\u66ff\u624b\u6bb5\u3092\u7d39\u4ecb\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3068\u4f7f\u7528\u5834\u9762\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<h3 class=\"wp-block-heading\" id=\"i-32\">1. strip()\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<p>Java 11\u3067\u5c0e\u5165\u3055\u308c\u305f <code>strip()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u3001<code>trim()<\/code> \u306e\u6539\u826f\u7248\u3068\u8a00\u3048\u307e\u3059\u3002\u4e3b\u306a\u9055\u3044\u306f Unicode \u7a7a\u767d\u6587\u5b57\u306e\u6271\u3044\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><code>strip()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-100\">\n<li>Unicode\u7a7a\u767d\u6587\u5b57\u3092\u6b63\u3057\u304f\u8a8d\u8b58\u3057\u524a\u9664\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-101\">\n<li>\u6587\u5b57\u306e\u65b9\u5411\u6027\uff08\u5de6\u304b\u3089\u53f3\u3001\u53f3\u304b\u3089\u5de6\uff09\u3092\u8003\u616e\u3059\u308b<\/li>\n<\/div>\n\n\n<li><code>stripLeading()<\/code> \u3068 <code>stripTrailing()<\/code> \u30e1\u30bd\u30c3\u30c9\u3082\u63d0\u4f9b\u3055\u308c\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\n<h4 class=\"wp-block-heading\" id=\"i-33\">\u30b3\u30fc\u30c9\u4f8b\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"\\u2000Hello, World!\\u2000\";\nSystem.out.println(\"trim(): '\" + text.trim() + \"'\");\nSystem.out.println(\"strip(): '\" + text.strip() + \"'\");<\/pre>\n\n\n<div id=\"sgb-css-id-104\">\n<h4 class=\"wp-block-heading\" id=\"i-34\">\u51fa\u529b\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">trim(): ' Hello, World! '\nstrip(): 'Hello, World!'<\/pre>\n\n\n<div id=\"sgb-css-id-105\">\n<p><code>strip()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f Unicode \u7a7a\u767d\u6587\u5b57\uff08\\u2000\uff09\u3092\u6b63\u3057\u304f\u9664\u53bb\u3057\u307e\u3059\u304c\u3001<code>trim()<\/code> \u306f\u305d\u308c\u3092\u7a7a\u767d\u3068\u8a8d\u8b58\u3057\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<h4 class=\"wp-block-heading\" id=\"i-35\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\uff1a<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<p>\u4e00\u822c\u7684\u306b\u3001<code>strip()<\/code> \u306f <code>trim()<\/code> \u3088\u308a\u3082\u82e5\u5e72\u9045\u3044\u50be\u5411\u306b\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5dee\u306f\u307b\u3068\u3093\u3069\u306e\u7528\u9014\u3067\u306f\u7121\u8996\u3067\u304d\u308b\u30ec\u30d9\u30eb\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<h3 class=\"wp-block-heading\" id=\"i-36\">2. replaceAll()\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\n<p><code>replaceAll()<\/code> \u30e1\u30bd\u30c3\u30c9\u3068\u6b63\u898f\u8868\u73fe\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306a\u7a7a\u767d\u9664\u53bb\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<h4 class=\"wp-block-heading\" id=\"i-37\">\u30b3\u30fc\u30c9\u4f8b\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String text = \"  Hello,   World!  \";\nString trimmed = text.replaceAll(\"^\\\\s+|\\\\s+$\", \"\");\nString allSpacesRemoved = text.replaceAll(\"\\\\s+\", \"\");\nString singleSpaces = text.replaceAll(\"\\\\s+\", \" \").trim();\n\nSystem.out.println(\"Trimmed: '\" + trimmed + \"'\");\nSystem.out.println(\"All spaces removed: '\" + allSpacesRemoved + \"'\");\nSystem.out.println(\"Single spaces: '\" + singleSpaces + \"'\");<\/pre>\n\n\n<div id=\"sgb-css-id-111\">\n<h4 class=\"wp-block-heading\" id=\"i-38\">\u51fa\u529b\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Trimmed: 'Hello,   World!'\nAll spaces removed: 'Hello,World!'\nSingle spaces: 'Hello, World!'<\/pre>\n\n\n<div id=\"sgb-css-id-112\">\n<p>\u3053\u306e\u65b9\u6cd5\u306f\u3001\u7279\u306b\u8907\u96d1\u306a\u7a7a\u767d\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u6709\u7528\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<h3 class=\"wp-block-heading\" id=\"i-39\">3. Apache Commons\u306eStringUtils<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p>Apache Commons Lang \u30e9\u30a4\u30d6\u30e9\u30ea\u306e <code>StringUtils<\/code> \u30af\u30e9\u30b9\u306f\u3001\u69d8\u3005\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\"><code>StringUtils<\/code> \u30af\u30e9\u30b9\u306e\u7279\u5fb4<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-115\">\n<li>null\u5b89\u5168\u6027<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-116\">\n<li>\u8907\u6570\u306e\u6587\u5b57\u5217\u3092\u540c\u6642\u306b\u51e6\u7406\u3059\u308b\u6a5f\u80fd<\/li>\n<\/div>\n\n\n<li>\u3088\u308a\u67d4\u8edf\u306a\u7a7a\u767d\u6587\u5b57\u306e\u5b9a\u7fa9<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<h4 class=\"wp-block-heading\" id=\"i-40\">\u30b3\u30fc\u30c9\u4f8b\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.apache.commons.lang3.StringUtils;\n\nString text = null;\nString trimmed = StringUtils.trim(text);\nSystem.out.println(\"Trimmed null: '\" + trimmed + \"'\");\n\nString[] texts = {\" Hello \", \" World \", null};\nString[] trimmedArray = StringUtils.stripAll(texts);\nSystem.out.println(\"Trimmed array: \" + Arrays.toString(trimmedArray));<\/pre>\n\n\n<div id=\"sgb-css-id-119\">\n<h4 class=\"wp-block-heading\" id=\"i-41\">\u51fa\u529b\uff1a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Trimmed null: ''\nTrimmed array: [Hello, World, null]<\/pre>\n\n\n<div id=\"sgb-css-id-120\">\n<p><code>StringUtils<\/code> \u306f null \u5b89\u5168\u3067\u3042\u308a\u3001\u914d\u5217\u5168\u4f53\u3092\u4e00\u5ea6\u306b\u51e6\u7406\u3067\u304d\u308b\u305f\u3081\u3001\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u3068\u5b89\u5168\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<h3 class=\"wp-block-heading\" id=\"i-42\">4. \u30ab\u30b9\u30bf\u30e0\u5b9f\u88c5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<p>\u7279\u5b9a\u306e\u8981\u4ef6\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u306e trim \u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<h4 class=\"wp-block-heading\" id=\"i-43\">\u4f8b\uff1a\u7279\u5b9a\u306e\u6587\u5b57\u3092\u9664\u53bb\u3059\u308b\u30ab\u30b9\u30bf\u30e0trim<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public static String customTrim(String str, char... charsToTrim) {\n    if (str == null || str.isEmpty()) return str;\n    int start = 0, end = str.length();\n    while (start &lt; end &amp;&amp; containsChar(charsToTrim, str.charAt(start))) start++;\n    while (end &gt; start &amp;&amp; containsChar(charsToTrim, str.charAt(end - 1))) end--;\n    return str.substring(start, end);\n}\n\nprivate static boolean containsChar(char[] chars, char ch) {\n    for (char c : chars) {\n        if (c == ch) return true;\n    }\n    return false;\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nString text = \"###Hello, World!###\";\nSystem.out.println(customTrim(text, '#', ' ')); \/\/ \u51fa\u529b: Hello, World!<\/pre>\n\n\n<div id=\"sgb-css-id-124\">\n<p>\u3053\u306e\u3088\u3046\u306a\u30ab\u30b9\u30bf\u30e0\u5b9f\u88c5\u306f\u3001\u7279\u6b8a\u306a\u6587\u5b57\u3084\u8907\u96d1\u306a\u6761\u4ef6\u3067\u306e trim \u64cd\u4f5c\u304c\u5fc5\u8981\u306a\u5834\u5408\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-125\">\n<h3 class=\"wp-block-heading\" id=\"i-44\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-126\">\n<p>\u5404\u624b\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u3001\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3084\u5b9f\u884c\u74b0\u5883\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5404\u624b\u6cd5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u50be\u5411<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-127\">\n<li><code>trim()<\/code>\uff1a \u6700\u3082\u9ad8\u901f\uff08\u30cd\u30a4\u30c6\u30a3\u30d6\u5b9f\u88c5\u306e\u305f\u3081\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-128\">\n<li><code>strip()<\/code>\uff1a <code>trim()<\/code> \u3088\u308a\u308f\u305a\u304b\u306b\u9045\u3044<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<li><code>replaceAll()<\/code>\uff1a \u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u4ed6\u306e\u65b9\u6cd5\u3088\u308a\u9045\u3044\u50be\u5411\u304c\u3042\u308b<\/li>\n<\/div>\n\n\n<li><code>StringUtils<\/code>\uff1a \u30e9\u30a4\u30d6\u30e9\u30ea\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u3042\u308b\u304c\u3001\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306f\u52b9\u7387\u7684<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-131\">\n<p>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u30c6\u30b9\u30c8\u3092\u884c\u3044\u3001\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-132\">\n<h3 class=\"wp-block-heading\" id=\"i-45\">\u4f7f\u7528\u30b7\u30fc\u30f3\u306e\u6bd4\u8f03<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-136\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u4f7f\u7528\u30b7\u30fc\u30f3\u306e\u6bd4\u8f03<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-133\">\n<li><code>trim()<\/code>\uff1a \u4e00\u822c\u7684\u306a\u7528\u9014\u3001\u9ad8\u901f\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<li><code>strip()<\/code>\uff1a Unicode\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001Java 11\u4ee5\u964d\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<li><code>replaceAll()<\/code>\uff1a \u8907\u96d1\u306a\u7a7a\u767d\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u6b63\u898f\u8868\u73fe\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n<\/div>\n\n\n<li><code>StringUtils<\/code>\uff1a null\u5b89\u5168\u6027\u304c\u91cd\u8981\u306a\u5834\u5408\u3001\u8907\u6570\u306e\u6587\u5b57\u5217\u3092\u540c\u6642\u306b\u51e6\u7406\u3059\u308b\u5834\u5408<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-137\">\n<p>\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u969b\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u6c42\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u8003\u616e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<p>\u5404\u4ee3\u66ff\u624b\u6bb5\u306b\u306f\u9577\u6240\u3068\u77ed\u6240\u304c\u3042\u308a\u307e\u3059\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u7279\u6027\u3084\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u624b\u6cd5\u3092\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3067\u304d\u308b\u304b\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<h2 class=\"wp-block-heading\" id=\"i-46\">6. \u5b9f\u8df5\u7684\u306atrim\u306e\u4f7f\u7528\u4f8b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-140\">\n<p><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3068\u305d\u306e\u4ee3\u66ff\u624b\u6bb5\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u69d8\u3005\u306a\u5f62\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5177\u4f53\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u901a\u3058\u3066\u3001\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3069\u306e\u3088\u3046\u306b\u5b9f\u8df5\u3067\u5f79\u7acb\u3064\u304b\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<h3 class=\"wp-block-heading\" id=\"i-47\">1. \u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<p>\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406\u306f\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u6700\u3082\u4e00\u822c\u7684\u306a\u4f7f\u7528\u4f8b\u306e1\u3064\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<h4 class=\"wp-block-heading\" id=\"i-48\">\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserRegistrationForm {\n    private String username;\n    private String email;\n\n    public void setUsername(String username) {\n        this.username = StringUtils.trimToNull(username);\n    }\n\n    public void setEmail(String email) {\n        this.email = StringUtils.trimToNull(email);\n    }\n\n    public boolean isValid() {\n        return username != null &amp;&amp; !username.isEmpty() \n            &amp;&amp; email != null &amp;&amp; email.contains(\"@\");\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-144\">\n<p>\u3053\u306eExample: \u30d1\u30e1\u30fc\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u524d\u306b\u30c7\u30fc\u30bf\u3092\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u3057\u3001\u7a7a\u306e\u6587\u5b57\u5217\u3092 <code>null<\/code> \u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3001\u4e00\u8cab\u6027\u306e\u3042\u308b\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<h4 class=\"wp-block-heading\" id=\"i-49\">\u691c\u7d22\u30af\u30a8\u30ea\u306e\u6700\u9069\u5316<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public List&lt;Product&gt; searchProducts(String query) {\n    String trimmedQuery = StringUtils.trimToEmpty(query);\n    if (trimmedQuery.isEmpty()) {\n        return Collections.emptyList();\n    }\n    return productRepository.findByNameContaining(trimmedQuery);\n}<\/pre>\n\n\n<div id=\"sgb-css-id-146\">\n<p>\u691c\u7d22\u30af\u30a8\u30ea\u3092 <code>trim<\/code> \u3059\u308b\u3053\u3068\u3067\u3001\u4e0d\u8981\u306a\u7a7a\u767d\u306b\u3088\u308b\u8aa4\u3063\u305f\u691c\u7d22\u7d50\u679c\u3092\u9632\u304e\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<h3 class=\"wp-block-heading\" id=\"i-50\">2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3067\u306f\u3001<code>trim()<\/code> \u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3061\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<h4 class=\"wp-block-heading\" id=\"i-51\">SQL\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u5bfe\u7b56<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public User findUserByUsername(String username) {\n    String sql = \"SELECT * FROM users WHERE username = ?\";\n    try (PreparedStatement stmt = connection.prepareStatement(sql)) {\n        stmt.setString(1, StringUtils.trim(username));\n        try (ResultSet rs = stmt.executeQuery()) {\n            if (rs.next()) {\n                return new User(rs.getString(\"username\"), rs.getString(\"email\"));\n            }\n        }\n    } catch (SQLException e) {\n        logger.error(\"Error querying database\", e);\n    }\n    return null;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-150\">\n<p>\u30e6\u30fc\u30b6\u30fc\u540d\u3092 <code>trim<\/code> \u3059\u308b\u3053\u3068\u3067\u3001\u7a7a\u767d\u6587\u5b57\u306b\u3088\u308b\u4e88\u671f\u305b\u306cSQL\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u306e\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-151\">\n<h3 class=\"wp-block-heading\" id=\"i-52\">3. \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-152\">\n<p>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3001\u7279\u306bCSV\u30d5\u30a1\u30a4\u30eb\u306e\u51e6\u7406\u3067\u306f\u3001<code>trim()<\/code> \u304c\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-153\">\n<h4 class=\"wp-block-heading\" id=\"i-53\">CSV\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public List&lt;Person&gt; readCsvFile(String filename) throws IOException {\n    List&lt;Person&gt; people = new ArrayList&lt;&gt;();\n    try (BufferedReader reader = new BufferedReader(new FileReader(filename))) {\n        String line;\n        while ((line = reader.readLine()) != null) {\n            String[] data = line.split(\",\");\n            if (data.length == 2) {\n                String name = StringUtils.trimToEmpty(data[0]);\n                int age = Integer.parseInt(StringUtils.trimToEmpty(data[1]));\n                people.add(new Person(name, age));\n            }\n        }\n    }\n    return people;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-154\">\n<p>CSV\u30d5\u30a1\u30a4\u30eb\u306e\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u3092 <code>trim<\/code> \u3059\u308b\u3053\u3068\u3067\u3001\u4e0d\u8981\u306a\u7a7a\u767d\u306b\u3088\u308b\u89e3\u6790\u30a8\u30e9\u30fc\u3092\u9632\u304e\u3001\u30c7\u30fc\u30bf\u306e\u54c1\u8cea\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-155\">\n<h3 class=\"wp-block-heading\" id=\"i-54\">4. trim\u30e1\u30bd\u30c3\u30c9\u3068\u4ee3\u66ff\u624b\u6bb5\u306e\u9078\u629e\u57fa\u6e96<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-156\">\n<p>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306atrim\u624b\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<h4 class=\"wp-block-heading\" id=\"i-55\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u304c\u53b3\u3057\u3044\u5834\u5408<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u9ad8\u901f\u306b\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u306e <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u304c\u6700\u9069\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public void processLargeDataset(List&lt;String&gt; data) {\n    long startTime = System.nanoTime();\n    List&lt;String&gt; processed = data.stream()\n                                 .map(String::trim)\n                                 .collect(Collectors.toList());\n    long endTime = System.nanoTime();\n    System.out.println(\"Processing time: \" + (endTime - startTime) + \" ns\");\n}<\/pre>\n\n\n<div id=\"sgb-css-id-159\">\n<h4 class=\"wp-block-heading\" id=\"i-56\">\u56fd\u969b\u5316\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u5834\u5408<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<p>Unicode\u6587\u5b57\u3092\u6b63\u3057\u304f\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001Java 11\u4ee5\u964d\u3067\u5229\u7528\u53ef\u80fd\u306a <code>strip()<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public String normalizeText(String input) {\n    if (input == null) {\n        return \"\";\n    }\n    return input.strip();\n}<\/pre>\n\n\n<div id=\"sgb-css-id-161\">\n<h4 class=\"wp-block-heading\" id=\"i-57\">\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u4e92\u63db\u6027\u304c\u5fc5\u8981\u306a\u5834\u5408<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-162\">\n<p>Java 8\u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u306e\u4e92\u63db\u6027\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001Apache Commons Lang\u306eStringUtils\u3092\u4f7f\u7528\u3059\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import org.apache.commons.lang3.StringUtils;\n\npublic String cleanInput(String input) {\n    return StringUtils.trimToEmpty(input);\n}<\/pre>\n\n\n<div id=\"sgb-css-id-163\">\n<h3 class=\"wp-block-heading\" id=\"i-58\">5. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<p>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u9ad8\u8ca0\u8377\u306a\u74b0\u5883\u3067\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\n<h4 class=\"wp-block-heading\" id=\"i-59\">\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u6642\u306e\u6700\u9069\u5316<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public List&lt;String&gt; optimizedBulkTrim(List&lt;String&gt; inputs) {\n    return inputs.parallelStream()\n                 .map(String::trim)\n                 .collect(Collectors.toList());\n}<\/pre>\n\n\n<div id=\"sgb-css-id-166\">\n<p><code>parallelStream()<\/code> \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30de\u30eb\u30c1\u30b3\u30a2\u30d7\u30ed\u30bb\u30c3\u30b5\u3092\u6d3b\u7528\u3057\u51e6\u7406\u3092\u9ad8\u901f\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-167\">\n<h4 class=\"wp-block-heading\" id=\"i-60\">null\u5b89\u5168\u306a\u51e6\u7406<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.Optional;\n\npublic String safeTrim(String input) {\n    return Optional.ofNullable(input)\n                   .map(String::trim)\n                   .orElse(\"\");\n}<\/pre>\n\n\n<div id=\"sgb-css-id-168\">\n<p><code>Optional<\/code> \u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001null\u5024\u3092\u5b89\u5168\u306b\u51e6\u7406\u3057\u3001NullPointerException\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-169\">\n<h3 class=\"wp-block-heading\" id=\"i-61\">6. \u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u8ab2\u984c\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-170\">\n<p>\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u69d8\u3005\u306a\u8ab2\u984c\u306b\u76f4\u9762\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e00\u822c\u7684\u306a\u8ab2\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-171\">\n<h4 class=\"wp-block-heading\" id=\"i-62\">\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u3067\u306etrim\u51e6\u7406\u306e\u6539\u5584<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-172\">\n<p>\u30ec\u30ac\u30b7\u30fc\u30b3\u30fc\u30c9\u3067\u306f\u3001\u4e0d\u9069\u5207\u306atrim\u51e6\u7406\u304c\u6563\u898b\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u6539\u5584\u3059\u308b\u306b\u306f\u3001\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u4e00\u8cab\u3057\u305ftrim\u51e6\u7406\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u304c\u6709\u52b9\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class StringUtil {\n    public static String safeTrim(String str) {\n        return str == null ? \"\" : str.trim();\n    }\n\n    public static String[] safeTrimAll(String... strings) {\n        return Arrays.stream(strings)\n                     .map(StringUtil::safeTrim)\n                     .toArray(String[]::new);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-173\">\n<p>\u3053\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u5927\u5e45\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u5b89\u5168\u3067\u4e00\u8cab\u3057\u305ftrim\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-174\">\n<h4 class=\"wp-block-heading\" id=\"i-63\">\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306e\u30c7\u30fc\u30bf\u6574\u5408\u6027\u78ba\u4fdd<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-175\">\n<p>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u9593\u3067\u306e\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u304c\u8ab2\u984c\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class DataNormalizer {\n    public static String normalizeForService(String input) {\n        return Optional.ofNullable(input)\n                       .map(String::trim)\n                       .map(String::toLowerCase)\n                       .orElse(\"\");\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-176\">\n<p>\u3053\u306e\u3088\u3046\u306a\u6b63\u898f\u5316\u30e1\u30bd\u30c3\u30c9\u3092\u5171\u901a\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3057\u3066\u63d0\u4f9b\u3057\u3001\u5168\u3066\u306e\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-177\">\n<h4 class=\"wp-block-heading\" id=\"i-64\">\u30c6\u30b9\u30c8\u99c6\u52d5\u958b\u767a (TDD) \u3067\u306etrim\u306e\u30c6\u30b9\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-178\">\n<p>TDD\u30a2\u30d7\u30ed\u30fc\u30c1\u3067trim\u51e6\u7406\u3092\u30c6\u30b9\u30c8\u3059\u308b\u5834\u5408\u3001\u5883\u754c\u5024\u30c6\u30b9\u30c8\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@Test\npublic void testTrimWithVariousInputs() {\n    assertEquals(\"hello\", StringUtil.safeTrim(\"  hello  \"));\n    assertEquals(\"\", StringUtil.safeTrim(\"   \"));\n    assertEquals(\"\", StringUtil.safeTrim(null));\n    assertEquals(\"hello world\", StringUtil.safeTrim(\" hello world \"));\n    assertEquals(\"hello\\nworld\", StringUtil.safeTrim(\" hello\\nworld \"));\n}<\/pre>\n\n\n<div id=\"sgb-css-id-179\">\n<p>\u3053\u306e\u3088\u3046\u306a\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u7528\u610f\u3059\u308b\u3053\u3068\u3067\u3001trim\u51e6\u7406\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3057\u3001\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3067\u306e\u52d5\u4f5c\u3092\u4fdd\u8a3c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-180\">\n<p>\u4ee5\u4e0a\u306e\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u901a\u3058\u3066\u3001<code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u3068\u305d\u306e\u4ee3\u66ff\u624b\u6bb5\u304c\u5b9f\u969b\u306e\u958b\u767a\u30b7\u30fc\u30f3\u3067\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3055\u308c\u308b\u304b\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u3002\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u307e\u3068\u3081\u3001\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-181\">\n<h2 class=\"wp-block-heading\" id=\"i-65\">7. \u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-182\">\n<h3 class=\"wp-block-heading\" id=\"i-66\">trim\u30e1\u30bd\u30c3\u30c9\u306e\u307e\u3068\u3081<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-183\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java \u306e <code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u4e3b\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u632f\u308a\u8fd4\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u307e\u3068\u3081<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-184\">\n<li><code>trim()<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u306e\u524d\u5f8c\u306e\u7a7a\u767d\u3092\u524a\u9664\u3059\u308b\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u64cd\u4f5c\u3067\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-185\">\n<li>\u9069\u5207\u306a\u4f7f\u7528\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u30af\u30ec\u30f3\u30b8\u30f3\u30b0\u3084\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306e\u51e6\u7406\u3092\u52b9\u7387\u7684\u306b\u884c\u3048\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-186\">\n<li><code>strip()<\/code>, <code>replaceAll()<\/code>, Apache Commons \u306e <code>StringUtils<\/code> \u306a\u3069\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u305f\u4ee3\u66ff\u624b\u6bb5\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-187\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5b89\u5168\u6027\u3092\u8003\u616e\u3057\u3001\u9069\u5207\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/div>\n\n\n<li>\u5b9f\u969b\u306e\u958b\u767a\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u51e6\u7406\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3001\u30d5\u30a1\u30a4\u30eb\u51e6\u7406\u306a\u3069\u3001\u69d8\u3005\u306a\u5834\u9762\u3067\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-188\">\n<p>\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u52b9\u7387\u7684\u306aJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-189\">\n<h3 class=\"wp-block-heading\" id=\"i-67\">\u6587\u5b57\u5217\u51e6\u7406\u306e\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-190\">\n<p>trim\u64cd\u4f5c\u3092\u542b\u3080\u6587\u5b57\u5217\u51e6\u7406\u30b9\u30ad\u30eb\u3092\u3055\u3089\u306b\u5411\u4e0a\u3055\u305b\u305f\u3044\u65b9\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-191\">\n<li><a href=\"https:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/lang\/String.html\">Java\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 \u2013 String \u30af\u30e9\u30b9<\/a><br>Java\u306e\u6587\u5b57\u5217\u51e6\u7406\u306b\u95a2\u3059\u308b\u516c\u5f0f\u306e\u60c5\u5831\u6e90\u3067\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-192\">\n<li>\u201cEffective Java\u201d by Joshua Bloch<br>Java\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3076\u306e\u306b\u6700\u9069\u306a\u66f8\u7c4d\u3067\u3001\u6587\u5b57\u5217\u51e6\u7406\u306b\u3064\u3044\u3066\u3082\u8a73\u3057\u304f\u89e3\u8aac\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-193\">\n<li><a href=\"https:\/\/www.baeldung.com\/java-string-operations\">Baeldung \u2013 Java String Operations<\/a><br>\u6587\u5b57\u5217\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u5b9f\u8df5\u7684\u306a\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u304c\u8c4a\u5bcc\u306b\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/tagged\/java+string\">Stack Overflow \u2013 Java String Questions<\/a><br>\u5b9f\u969b\u306e\u958b\u767a\u8005\u304c\u76f4\u9762\u3059\u308b\u554f\u984c\u3068\u89e3\u6c7a\u7b56\u3092\u5b66\u3079\u308b\u30d5\u30a9\u30fc\u30e9\u30e0\u3067\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-194\">\n<p>\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8ab2\u984c\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3078\u306e\u8ab2\u984c<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-195\">\n<li>\u81ea\u4f5c\u306etrim\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u958b\u767a\u3057\u3001GitHub\u4e0a\u3067\u516c\u958b\u3059\u308b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-196\">\n<li>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306etrim\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306b\u6311\u6226\u3059\u308b\u3002<\/li>\n<\/div>\n\n\n<li>\u56fd\u969b\u5316\u5bfe\u5fdc\u3092\u8003\u616e\u3057\u305fWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3057\u3001\u69d8\u3005\u306a\u8a00\u8a9e\u306e\u6587\u5b57\u5217\u51e6\u7406\u3092\u5b9f\u8df5\u3059\u308b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u8ab2\u984c\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3067\u3001\u5b9f\u8df5\u7684\u306a\u30b9\u30ad\u30eb\u3092\u78e8\u304d\u3001\u3088\u308a\u8907\u96d1\u306a\u6587\u5b57\u5217\u51e6\u7406\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u958b\u767a\u8005\u3078\u3068\u6210\u9577\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":3040,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,70,66],"tags":[],"class_list":{"0":"post-417","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-java","8":"category-java-string","9":"category-java-syntax"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=417"}],"version-history":[{"count":3,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/417\/revisions"}],"predecessor-version":[{"id":506,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/417\/revisions\/506"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/media\/3040"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}