{"id":353,"date":"2024-10-23T12:10:49","date_gmt":"2024-10-23T03:10:49","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=353"},"modified":"2025-03-24T08:53:22","modified_gmt":"2025-03-23T23:53:22","slug":"java-replace%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e8%ac%9b%e5%ba%a7%ef%bc%9a%e5%9f%ba%e7%a4%8e%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be%e3%81%a7%e5%ae%8c%e5%85%a8%e8%a7%a3%e8%aa%ac%e3%80%90","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=353","title":{"rendered":"Java replace\u30de\u30b9\u30bf\u30fc\u8b1b\u5ea7\uff1a\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u5b8c\u5168\u89e3\u8aac\u3010\u52b9\u7387UP\u306e\u88cf\u6280\u3082\u3011"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6587\u5b57\u5217\u64cd\u4f5c\u306f\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u91cd\u8981\u306a\u4f5c\u696d\u3067\u3059\u3002\u305d\u306e\u4e2d\u3067\u3082<code>replace<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u306e\u4e00\u90e8\u3092\u5225\u306e\u6587\u5b57\u5217\u306b\u7f6e\u304d\u63db\u3048\u308b\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u958b\u767a\u8005\u306e\u305f\u3081\u306ereplace\u30e1\u30bd\u30c3\u30c9\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u306b\u3064\u3044\u3066\u3001\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\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\">\u5f53\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/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-3\">\n<li>replace\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u3001replaceAll\u3068\u306e\u9055\u3044<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<li>\u6b63\u898f\u8868\u73fe\u3092\u6d3b\u7528\u3057\u305f\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u65b9\u6cd5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-6\">\n<li>\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<li>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3078\u306e\u5bfe\u51e6\u6cd5\u3068\u6ce8\u610f\u70b9<\/li>\n<\/div>\n\n\n<li>\u4ed6\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u9023\u643a\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<p>\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3080\u3053\u3068\u3067\u3001Java\u3067\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u30b9\u30ad\u30eb\u304c\u5411\u4e0a\u3057\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u521d\u5fc3\u8005\u304b\u3089\u4e2d\u7d1a\u8005\u307e\u3067\u3001\u3059\u3079\u3066\u306eJava\u958b\u767a\u8005\u306b\u3068\u3063\u3066\u4fa1\u5024\u3042\u308b\u60c5\u5831\u304c\u6e80\u8f09\u3067\u3059\u3002\u305c\u3072\u6700\u5f8c\u307e\u3067\u304a\u8aad\u307f\u304f\u3060\u3055\u3044\uff01<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\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. Java replace\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">1.1 String.replace()\u306e\u57fa\u672c\u69cb\u6587\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-2\">1.2 replace\u3068replaceAll\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">1.3 \u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">2. \u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">2.1 \u6b63\u898f\u8868\u73fe\u3092\u6d3b\u7528\u3057\u305f\u30d1\u30ef\u30d5\u30eb\u306a\u7f6e\u63db<\/a>      <\/li>      <li>        <a href=\"#i-6\">2.2 \u8907\u6570\u306e\u6587\u5b57\u5217\u3092\u4e00\u5ea6\u306b\u7f6e\u63db\u3059\u308b\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">2.3 \u6761\u4ef6\u4ed8\u304d\u7f6e\u63db\uff1areplace\u30e1\u30bd\u30c3\u30c9\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">3. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30b3\u30c4<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">3.1 StringBuilder vs String.replace()\uff1a\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li>        <a href=\"#i-10\">3.2 \u5927\u91cf\u30c6\u30ad\u30b9\u30c8\u51e6\u7406\u6642\u306e\u52b9\u7387\u7684\u306a\u7f6e\u63db\u6226\u7565<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">3.3 \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">4. \u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">4.1 CSV\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306breplace\u3092\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-14\">4.2 \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u6574\u5f62\u3068\u5206\u6790\u306b\u304a\u3051\u308b\u7f6e\u63db\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">4.3 \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u306e\u5b9f\u88c5\uff1a\u52d5\u7684\u30c6\u30ad\u30b9\u30c8\u751f\u6210<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">5. replace\u30e1\u30bd\u30c3\u30c9\u306e\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u5bfe\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">5.1 NULL\u5024\u3068\u7a7a\u6587\u5b57\u5217\u306e\u53d6\u308a\u6271\u3044<\/a>      <\/li>      <li>        <a href=\"#i-18\">5.2 \u7279\u6b8a\u6587\u5b57\u3068\u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9\u306e\u51e6\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">5.3 Unicode\u6587\u5b57\u3068\u56fd\u969b\u5316\u5bfe\u5fdc\u3067\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-20\">6. replace\u3068\u4ed6\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u306e\u9023\u643a<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">6.1 split()\u3068replace()\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u52a0\u5de5<\/a>      <\/li>      <li>        <a href=\"#i-22\">6.2 \u6b63\u898f\u8868\u73fe\u3068replace()\uff1areplaceAll()\u306e\u771f\u306e\u529b\u3092\u89e3\u653e<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">6.3 Stream API\u3092\u6d3b\u7528\u3057\u305f\u9769\u65b0\u7684\u306a\u7f6e\u63db\u51e6\u7406<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-24\">\u7d50\u8ad6<\/a>  <\/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. Java replace\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6587\u5b57\u5217\u64cd\u4f5c\u306f\u65e5\u5e38\u7684\u306a\u30bf\u30b9\u30af\u306e\u4e00\u3064\u3067\u3059\u3002\u305d\u306e\u4e2d\u3067\u3082<code>replace<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u5185\u306e\u7279\u5b9a\u306e\u90e8\u5206\u3092\u5225\u306e\u6587\u5b57\u5217\u306b\u7f6e\u304d\u63db\u3048\u308b\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>replace<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u3001\u3088\u304f\u6df7\u540c\u3055\u308c\u308b<code>replaceAll<\/code>\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u9055\u3044\u3001\u305d\u3057\u3066\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af\u307e\u3067\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">1.1 String.replace()\u306e\u57fa\u672c\u69cb\u6587\u3068\u4f7f\u3044\u65b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<p><code>String.replace()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u5185\u306e\u6307\u5b9a\u3055\u308c\u305f\u90e8\u5206\u6587\u5b57\u5217\u3092\u3059\u3079\u3066\u65b0\u3057\u3044\u6587\u5b57\u5217\u306b\u7f6e\u304d\u63db\u3048\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=\"\">public String replace(CharSequence target, CharSequence replacement)<\/pre>\n\n\n<div id=\"sgb-css-id-14\">\n<p>\u4f7f\u7528\u4f8b\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=\"\">String originalString = \"Hello, World!\";\nString newString = originalString.replace(\"World\", \"Java\");\nSystem.out.println(newString); \/\/ \u51fa\u529b: Hello, Java!<\/pre>\n\n\n<div id=\"sgb-css-id-16\">\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:#ffb36b;color:#FFF\" class=\"sgb-box-simple__title\">\u6ce8\u610f\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#ffb36b;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-15\">\n<li><code>replace()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u5143\u306e\u6587\u5b57\u5217\u3092\u5909\u66f4\u305b\u305a\u3001\u65b0\u3057\u3044\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li>\u7f6e\u63db\u5bfe\u8c61\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u3001\u5143\u306e\u6587\u5b57\u5217\u304c\u305d\u306e\u307e\u307e\u8fd4\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-17\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.2 replace\u3068replaceAll\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<p><code>replace<\/code>\u3068<code>replaceAll<\/code>\u306f\u4f3c\u305f\u3088\u3046\u306a\u6a5f\u80fd\u3092\u6301\u3061\u307e\u3059\u304c\u3001\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<p>1.<code>replace(CharSequence target, CharSequence replacement)<\/code><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-20\">\n<li>\u30ea\u30c6\u30e9\u30eb\u6587\u5b57\u5217\u3092\u7f6e\u63db<\/li>\n<\/div>\n\n\n<li>\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3057\u306a\u3044<\/li>\n<\/ul>\n\n\n<div id=\"sgb-css-id-21\">\n<p>2.<code>replaceAll(String regex, String replacement)<\/code><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-22\">\n<li>\u6b63\u898f\u8868\u73fe\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u7f6e\u63db<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<li>\u3088\u308a\u67d4\u8edf\u306a\u7f6e\u63db\u304c\u53ef\u80fd\u3060\u304c\u3001\u7279\u6b8a\u6587\u5b57\u306e\u30a8\u30b9\u30b1\u30fc\u30d7\u304c\u5fc5\u8981<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-24\">\n<p> \u4f7f\u7528\u4f8b\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=\"\">String text = \"The cat and the Cat\";\nSystem.out.println(text.replace(\"cat\", \"dog\"));     \/\/ \u51fa\u529b: The dog and the Cat\nSystem.out.println(text.replaceAll(\"(?i)cat\", \"dog\")); \/\/ \u51fa\u529b: The dog and the dog<\/pre>\n\n\n<div id=\"sgb-css-id-25\">\n<p><code>replaceAll<\/code>\u306e\u5834\u5408\u3001<code>(?i)<\/code>\u306f\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u30d5\u30e9\u30b0\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-26\">\n<h3 class=\"wp-block-heading\" id=\"i-3\">1.3 \u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<p>\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u305b\u305a\u306b\u7f6e\u63db\u3057\u305f\u3044\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30c6\u30af\u30cb\u30c3\u30af\u304c\u6709\u52b9\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-28\">\n<li><code>replaceAll<\/code>\u30e1\u30bd\u30c3\u30c9\u3068\u6b63\u898f\u8868\u73fe\u306e\u7d44\u307f\u5408\u308f\u305b\uff1a<\/li>\n<\/div><\/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 text = \"HELLO hello HeLLo\";\nString result = text.replaceAll(\"(?i)hello\", \"hi\");\nSystem.out.println(result); \/\/ \u51fa\u529b: HI hi HI<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-29\">\n<li><code>Pattern<\/code>\u30af\u30e9\u30b9\u3068<code>Matcher<\/code>\u30af\u30e9\u30b9\u306e\u4f7f\u7528\uff1a<\/li>\n<\/div><\/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=\"\">import java.util.regex.Pattern;\nimport java.util.regex.Matcher;\n\nString text = \"HELLO hello HeLLo\";\nPattern pattern = Pattern.compile(\"hello\", Pattern.CASE_INSENSITIVE);\nMatcher matcher = pattern.matcher(text);\nString result = matcher.replaceAll(\"hi\");\nSystem.out.println(result); \/\/ \u51fa\u529b: HI hi HI<\/pre>\n\n\n<div id=\"sgb-css-id-30\">\n<p>\u3053\u306e\u65b9\u6cd5\u306f\u3001\u3088\u308a\u8907\u96d1\u306a\u7f6e\u63db\u30d1\u30bf\u30fc\u30f3\u3084\u3001\u7f6e\u63db\u51e6\u7406\u3092\u518d\u5229\u7528\u3059\u308b\u5834\u5408\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<p>\u4ee5\u4e0a\u304c<code>replace<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u57fa\u672c\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u3084\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3078\u306e\u6e96\u5099\u304c\u6574\u3044\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<h2 class=\"wp-block-heading\" id=\"i-4\">2. \u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<p>\u57fa\u672c\u7684\u306a<code>replace<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u62bc\u3055\u3048\u305f\u3068\u3053\u308d\u3067\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af\u306b\u8e0f\u307f\u8fbc\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u6b63\u898f\u8868\u73fe\u3092\u6d3b\u7528\u3057\u305f\u67d4\u8edf\u306a\u7f6e\u63db\u3001\u8907\u6570\u306e\u6587\u5b57\u5217\u3092\u52b9\u7387\u7684\u306b\u7f6e\u63db\u3059\u308b\u65b9\u6cd5\u3001\u305d\u3057\u3066\u6761\u4ef6\u4ed8\u304d\u7f6e\u63db\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b66\u3073\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6280\u8853\u3092\u7fd2\u5f97\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30bf\u30b9\u30af\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">2.1 \u6b63\u898f\u8868\u73fe\u3092\u6d3b\u7528\u3057\u305f\u30d1\u30ef\u30d5\u30eb\u306a\u7f6e\u63db<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-35\">\n<p>\u6b63\u898f\u8868\u73fe\uff08regex\uff09\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u8907\u96d1\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u7f6e\u63db\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002Java\u3067\u306f<code>replaceAll<\/code>\u30e1\u30bd\u30c3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<p>\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b\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=\"\">String text = \"The year is 2023, and the date is 2023-05-15.\";\nString result = text.replaceAll(\"\\\\d{4}\", \"YYYY\");\nSystem.out.println(result); \/\/ \u51fa\u529b: The year is YYYY, and the date is YYYY-05-15.<\/pre>\n\n\n<div id=\"sgb-css-id-37\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u30014\u6841\u306e\u6570\u5b57\u3092\u5168\u3066 \u201cYYYY\u201d \u306b\u7f6e\u63db\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-38\">\n<p>\u3088\u308a\u9ad8\u5ea6\u306a\u4f8b\uff08\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u533f\u540d\u5316\uff09\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=\"\">String email = \"Please contact john.doe@example.com or jane@email.co.uk\";\nString anonymized = email.replaceAll(\"([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\\\.[a-zA-Z0-9_-]+)\", \"****@****.***\");\nSystem.out.println(anonymized);\n\/\/ \u51fa\u529b: Please contact ****@****.*** or ****@****.***<\/pre>\n\n\n<div id=\"sgb-css-id-39\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u691c\u51fa\u3057\u3001\u533f\u540d\u5316\u3055\u308c\u305f\u5f62\u5f0f\u306b\u7f6e\u63db\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">2.2 \u8907\u6570\u306e\u6587\u5b57\u5217\u3092\u4e00\u5ea6\u306b\u7f6e\u63db\u3059\u308b\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<p>\u8907\u6570\u306e\u6587\u5b57\u5217\u3092\u52b9\u7387\u7684\u306b\u7f6e\u63db\u3059\u308b\u65b9\u6cd5\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-42\">\n<li>\u9023\u7d9a\u3057\u305f<code>replace<\/code>\u547c\u3073\u51fa\u3057\uff1a<\/li>\n<\/div><\/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 text = \"The quick brown fox jumps over the lazy dog\";\nString result = text.replace(\"quick\", \"slow\")\n                    .replace(\"brown\", \"red\")\n                    .replace(\"lazy\", \"energetic\");\nSystem.out.println(result);\n\/\/ \u51fa\u529b: The slow red fox jumps over the energetic dog<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-43\">\n<li><code>Map<\/code>\u3092\u4f7f\u7528\u3057\u305f\u52d5\u7684\u306a\u7f6e\u63db\uff1a<\/li>\n<\/div><\/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=\"\">import java.util.Map;\nimport java.util.HashMap;\n\nString text = \"The quick brown fox jumps over the lazy dog\";\nMap&lt;String, String&gt; replacements = new HashMap&lt;&gt;();\nreplacements.put(\"quick\", \"slow\");\nreplacements.put(\"brown\", \"red\");\nreplacements.put(\"lazy\", \"energetic\");\n\nfor (Map.Entry&lt;String, String&gt; entry : replacements.entrySet()) {\n    text = text.replace(entry.getKey(), entry.getValue());\n}\nSystem.out.println(text);\n\/\/ \u51fa\u529b: The slow red fox jumps over the energetic dog<\/pre>\n\n\n<div id=\"sgb-css-id-44\">\n<p>\u3053\u306e\u65b9\u6cd5\u306f\u3001\u7f6e\u63db\u30d1\u30bf\u30fc\u30f3\u304c\u52d5\u7684\u306b\u5909\u66f4\u3055\u308c\u308b\u5834\u5408\u306b\u7279\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-45\">\n<h3 class=\"wp-block-heading\" id=\"i-7\">2.3 \u6761\u4ef6\u4ed8\u304d\u7f6e\u63db\uff1areplace\u30e1\u30bd\u30c3\u30c9\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p>Java 8\u4ee5\u964d\u3067\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u6761\u4ef6\u4ed8\u304d\u7f6e\u63db\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p>\u4f8b\u3048\u3070\u3001\u5076\u6570\u306e\u307f\u3092\u5225\u306e\u6570\u5b57\u306b\u7f6e\u63db\u3059\u308b\u5834\u5408\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=\"\">String numbers = \"1 2 3 4 5 6 7 8 9 10\";\nString result = numbers.replaceAll(\"\\\\d+\", m -&gt; {\n    int num = Integer.parseInt(m.group());\n    return (num % 2 == 0) ? \"even\" : String.valueOf(num);\n});\nSystem.out.println(result); \/\/ \u51fa\u529b: 1 even 3 even 5 even 7 even 9 even<\/pre>\n\n\n<div id=\"sgb-css-id-48\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>replaceAll<\/code>\u30e1\u30bd\u30c3\u30c9\u306e\u7b2c\u4e8c\u5f15\u6570\u306b\u30e9\u30e0\u30c0\u5f0f\u3092\u6e21\u3057\u3066\u3044\u307e\u3059\u3002\u30e9\u30e0\u30c0\u5f0f\u5185\u3067\u6761\u4ef6\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u5076\u6570\u306e\u5834\u5408\u306e\u307f \u201ceven\u201d \u306b\u7f6e\u63db\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-49\">\n<p>\u3088\u308a\u8907\u96d1\u306a\u4f8b\uff08\u65e5\u4ed8\u5f62\u5f0f\u306e\u5909\u63db\uff09\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=\"\">String dates = \"2023-05-15, 2023\/05\/16, 2023.05.17\";\nString result = dates.replaceAll(\"(\\\\d{4})[-.](\\\\d{2})[-.](\\\\d{2})\", m -&gt; {\n   String year = m.group(1);\n   String month = m.group(2);\n   String day = m.group(3);\n   return day + \"\/\" + month + \"\/\" + year;\n});\nSystem.out.println(result); \/\/ \u51fa\u529b: 15\/05\/2023, 16\/05\/2023, 17\/05\/2023<\/pre>\n\n\n<div id=\"sgb-css-id-50\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u7570\u306a\u308b\u533a\u5207\u308a\u6587\u5b57\u3067\u66f8\u304b\u308c\u305f\u65e5\u4ed8\u3092\u7d71\u4e00\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff08DD\/MM\/YYYY\uff09\u306b\u5909\u63db\u3057\u3066\u3044\u307e\u3059\u3002\u6b63\u898f\u8868\u73fe\u3068\u30e9\u30e0\u30c0\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u975e\u5e38\u306b\u67d4\u8edf\u306a\u7f6e\u63db\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<p>\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u6587\u5b57\u5217\u51e6\u7406\u30bf\u30b9\u30af\u3092\u52b9\u7387\u7684\u306b\u89e3\u6c7a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u8907\u96d1\u306a\u6b63\u898f\u8868\u73fe\u3084\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6ce8\u610f\u3092\u6255\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5927\u898f\u6a21\u306a\u30c6\u30ad\u30b9\u30c8\u51e6\u7406\u3067\u306f\u3001<code>StringBuilder<\/code>\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001\u51e6\u7406\u3092\u5206\u5272\u3057\u305f\u308a\u3059\u308b\u306a\u3069\u306e\u6700\u9069\u5316\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u9069\u7528\u3059\u308b\u65b9\u6cd5\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30b3\u30c4\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-53\">\n<h2 class=\"wp-block-heading\" id=\"i-8\">3. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30b3\u30c4<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<p>\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7fd2\u5f97\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u6b21\u306b\u91cd\u8981\u306a\u306e\u306f\u305d\u308c\u3089\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Java \u3067\u306e\u6587\u5b57\u5217\u7f6e\u63db\u64cd\u4f5c\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u30b3\u30c4\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">3.1 StringBuilder vs String.replace()\uff1a\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-56\">\n<p><code>String<\/code> \u306f\u4e0d\u5909\uff08immutable\uff09\u3067\u3042\u308b\u306e\u306b\u5bfe\u3057\u3001<code>StringBuilder<\/code> \u306f\u53ef\u5909\uff08mutable\uff09\u3067\u3059\u3002\u3053\u306e\u7279\u6027\u306e\u9055\u3044\u306f\u3001\u5927\u91cf\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u3092\u884c\u3046\u969b\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\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.replace() \u306e\u4f8b\nString text = \"Hello, World!\";\nfor (int i = 0; i &lt; 1000; i++) {\n    text = text.replace(\"o\", \"0\");\n}\n\n\/\/ StringBuilder \u306e\u4f8b\nStringBuilder sb = new StringBuilder(\"Hello, World!\");\nfor (int i = 0; i &lt; 1000; i++) {\n    int index;\n    while ((index = sb.indexOf(\"o\")) != -1) {\n        sb.replace(index, index + 1, \"0\");\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-57\">\n<p><code>String.replace()<\/code> \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u6bce\u56de\u65b0\u3057\u3044 <code>String<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u4e00\u65b9\u3001<code>StringBuilder<\/code> \u3067\u306f\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u66f4\u65b0\u3059\u308b\u305f\u3081\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u826f\u304f\u3001\u5927\u91cf\u306e\u7f6e\u63db\u64cd\u4f5c\u3067\u3088\u308a\u9ad8\u901f\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<p>\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\uff081,000,000\u56de\u306e\u7f6e\u63db\u64cd\u4f5c\uff09\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-59\">\n<li>String.replace()\uff1a \u7d04 2500 ms<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-60\">\n<li>StringBuilder\uff1a \u7d04 150 ms<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-61\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">3.2 \u5927\u91cf\u30c6\u30ad\u30b9\u30c8\u51e6\u7406\u6642\u306e\u52b9\u7387\u7684\u306a\u7f6e\u63db\u6226\u7565<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<p>\u5927\u91cf\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u6226\u7565\u304c\u52b9\u679c\u7684\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\">\u5927\u91cf\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\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-63\">\n<li>\u30c1\u30e3\u30f3\u30af\u51e6\u7406\uff1a\u30c6\u30ad\u30b9\u30c8\u3092\u5c0f\u3055\u306a\u90e8\u5206\u306b\u5206\u5272\u3057\u3066\u51e6\u7406<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<li>\u4e26\u5217\u51e6\u7406\uff1aJava 8 \u4ee5\u964d\u306e Stream API \u3068 <code>parallel()<\/code> \u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528<\/li>\n<\/div>\n\n\n<li>\u30e1\u30e2\u30ea\u30de\u30c3\u30d4\u30f3\u30b0\u30d5\u30a1\u30a4\u30eb\uff1a\u5927\u898f\u6a21\u30d5\u30a1\u30a4\u30eb\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-65\">\n<p>\u4e26\u5217\u51e6\u7406\u306e\u4f8b\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=\"\">List&lt;String&gt; lines = Files.readAllLines(Paths.get(\"large_file.txt\"));\nlines.parallelStream()\n     .map(line -&gt; line.replaceAll(\"pattern\", \"replacement\"))\n     .forEach(System.out::println);<\/pre>\n\n\n<div id=\"sgb-css-id-66\">\n<p>\u3053\u306e\u65b9\u6cd5\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\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\n<h3 class=\"wp-block-heading\" id=\"i-11\">3.3 \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-68\">\n<p>1.\u4e0d\u8981\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u306e\u56de\u907f\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-69\">\n<li>\u6b63\u898f\u8868\u73fe\u30d1\u30bf\u30fc\u30f3\u3092\u518d\u5229\u7528\u3059\u308b<\/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=\"\">   Pattern pattern = Pattern.compile(\"regex\");\n   Matcher matcher = pattern.matcher(input);\n   while (matcher.find()) {\n       \/\/ \u51e6\u7406\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-70\">\n<p>2.StringBuffer vs StringBuilder \u306e\u4f7f\u3044\u5206\u3051\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-71\">\n<li>\u5358\u4e00\u30b9\u30ec\u30c3\u30c9\u306e\u5834\u5408\u306f <code>StringBuilder<\/code> \u3092\u4f7f\u7528\uff08\u540c\u671f\u5316\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u306a\u3044\uff09<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<li>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306f <code>StringBuffer<\/code> \u3092\u4f7f\u7528\uff08\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\uff09<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-73\">\n<p>3.\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u9632\u6b62\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-74\">\n<li>\u5927\u304d\u306a <code>StringBuilder<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3044\u7d42\u308f\u3063\u305f\u3089 <code>null<\/code> \u3092\u4ee3\u5165\u3057\u3066\u53c2\u7167\u3092\u89e3\u653e<\/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=\"\">StringBuilder largeBuilder = new StringBuilder(1000000);\n\/\/ \u51e6\u7406\nlargeBuilder = null; \/\/ \u30e1\u30e2\u30ea\u3092\u89e3\u653e<\/pre>\n\n\n<div id=\"sgb-css-id-75\">\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u7528\u3059\u308b\u969b\u306f\u3001\u5e38\u306b\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u3068\u30d9\u30f3\u30c1\u30de\u30fc\u30ad\u30f3\u30b0\u3092\u884c\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002Java Mission Control \u3084 VisualVM \u306a\u3069\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3084 GC \u306e\u52d5\u4f5c\u3092\u76e3\u8996\u3057\u3001\u6700\u9069\u5316\u306e\u52b9\u679c\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-76\">\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u898f\u6a21\u3084\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5c0f\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u904e\u5ea6\u306a\u6700\u9069\u5316\u306f\u907f\u3051\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-77\">\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u9069\u7528\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-78\">\n<h2 class=\"wp-block-heading\" id=\"i-12\">4. \u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\n<p>\u3053\u308c\u307e\u3067\u306b\u5b66\u3093\u3060Java\u306ereplace\u30e1\u30bd\u30c3\u30c9\u3068\u305d\u306e\u95a2\u9023\u30c6\u30af\u30cb\u30c3\u30af\u3092\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b7\u30fc\u30f3\u3067\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3067\u304d\u308b\u304b\u3001\u5177\u4f53\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u901a\u3058\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u3001\u30ed\u30b0\u5206\u6790\u3001\u52d5\u7684\u30c6\u30ad\u30b9\u30c8\u751f\u6210\u3068\u3044\u30463\u3064\u306e\u4e00\u822c\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u53d6\u308a\u4e0a\u3052\u3001replace\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u5fdc\u7528\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">4.1 CSV\u30c7\u30fc\u30bf\u306e\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306breplace\u3092\u6d3b\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-81\">\n<p>CSV\u30c7\u30fc\u30bf\u306f\u591a\u304f\u306e\u696d\u52d9\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u304c\u3001\u3057\u3070\u3057\u3070\u4e0d\u6b63\u306a\u5f62\u5f0f\u3084\u4f59\u5206\u306a\u30c7\u30fc\u30bf\u3092\u542b\u3093\u3067\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002replace\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u3053\u3046\u3057\u305f\u30c7\u30fc\u30bf\u3092\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\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 java.util.stream.Collectors;\nimport java.util.stream.Stream;\n\npublic class CsvCleaner {\n    public static String cleanCsvLine(String line) {\n        return Stream.of(line.split(\",\"))\n                     .map(field -&gt; field.trim()\n                                        .replace(\"\\\"\", \"\")\n                                        .replaceAll(\"\\\\s+\", \" \")\n                                        .replaceAll(\"(\\\\d{2})\/(\\\\d{2})\/(\\\\d{4})\", \"$3-$2-$1\"))\n                     .collect(Collectors.joining(\",\"));\n    }\n\n    public static void main(String[] args) {\n        String dirtyLine = \"\\\"John Doe\\\" , 30 ,  \\\"New     York\\\" , \\\"01\/15\/2023\\\"\";\n        String cleanLine = cleanCsvLine(dirtyLine);\n        System.out.println(cleanLine);\n        \/\/ \u51fa\u529b: John Doe,30,New York,2023-15-01\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-82\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u64cd\u4f5c\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-83\">\n<li>\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u524d\u5f8c\u306e\u7a7a\u767d\u3092\u524a\u9664<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<li>\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u524a\u9664<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\n<li>\u9023\u7d9a\u3059\u308b\u7a7a\u767d\u30921\u3064\u306e\u7a7a\u767d\u306b\u7f6e\u63db<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<li>\u65e5\u4ed8\u5f62\u5f0f\u3092\u5909\u63db\uff08MM\/DD\/YYYY \u2192 YYYY-MM-DD\uff09<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-87\">\n<p>\u5927\u898f\u6a21\u306aCSV\u30d5\u30a1\u30a4\u30eb\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u65b9\u6cd5\u3092Stream API\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4e26\u5217\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<h3 class=\"wp-block-heading\" id=\"i-14\">4.2 \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u6574\u5f62\u3068\u5206\u6790\u306b\u304a\u3051\u308b\u7f6e\u63db\u6d3b\u7528\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<p>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u6790\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u52d5\u4f5c\u3092\u7406\u89e3\u3057\u554f\u984c\u3092\u7279\u5b9a\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002replace\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u6574\u5f62\u3057\u3001\u5fc5\u8981\u306a\u60c5\u5831\u3092\u62bd\u51fa\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\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 java.nio.file.Files;\nimport java.nio.file.Paths;\nimport java.util.regex.Pattern;\nimport java.util.stream.Stream;\n\npublic class LogAnalyzer {\n    private static final Pattern LOG_PATTERN = Pattern.compile(\"(\\\\d{4}-\\\\d{2}-\\\\d{2} \\\\d{2}:\\\\d{2}:\\\\d{2}) \\\\[(.+?)\\\\] (.+)\");\n\n    public static void analyzeLog(String filePath) throws Exception {\n        try (Stream&lt;String&gt; lines = Files.lines(Paths.get(filePath))) {\n            lines.map(line -&gt; LOG_PATTERN.matcher(line))\n                 .filter(matcher -&gt; matcher.matches())\n                 .map(matcher -&gt; {\n                     String timestamp = matcher.group(1);\n                     String level = matcher.group(2);\n                     String message = matcher.group(3)\n                         .replaceAll(\"\\\\b(error|exception|failed)\\\\b\", \"&lt;span style='color:red'&gt;$1&lt;\/span&gt;\");\n                     return String.format(\"%s [%s] %s\", timestamp, level, message);\n                 })\n                 .forEach(System.out::println);\n        }\n    }\n\n    public static void main(String[] args) throws Exception {\n        analyzeLog(\"application.log\");\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-90\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u64cd\u4f5c\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-91\">\n<li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u5404\u884c\u3092\u6b63\u898f\u8868\u73fe\u3067\u30d1\u30fc\u30b9\u3057\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001\u30ed\u30b0\u30ec\u30d9\u30eb\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u62bd\u51fa<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<li>\u30a8\u30e9\u30fc\u95a2\u9023\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u5f37\u8abf\u8868\u793a\u3059\u308b\u305f\u3081\u306bHTML\u30bf\u30b0\u3067\u56f2\u3080<\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-93\">\n<p>\u3053\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5927\u898f\u6a21\u306a\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3067\u3082\u30a8\u30e9\u30fc\u3084\u91cd\u8981\u306a\u30a4\u30d9\u30f3\u30c8\u3092\u7d20\u65e9\u304f\u8b58\u5225\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">4.3 \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u306e\u5b9f\u88c5\uff1a\u52d5\u7684\u30c6\u30ad\u30b9\u30c8\u751f\u6210<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<p>\u30b7\u30f3\u30d7\u30eb\u306a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u52d5\u7684\u306a\u30c6\u30ad\u30b9\u30c8\u751f\u6210\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002replaceAll\u30e1\u30bd\u30c3\u30c9\u3068\u30e9\u30e0\u30c0\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u57fa\u672c\u7684\u306a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u3092\u4f5c\u6210\u3057\u3066\u307f\u307e\u3057\u3087\u3046\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 java.util.Map;\nimport java.util.regex.Pattern;\n\npublic class SimpleTemplateEngine {\n    private static final Pattern PLACEHOLDER_PATTERN = Pattern.compile(\"\\\\{\\\\{(.+?)\\\\}\\\\}\");\n\n    public static String render(String template, Map&lt;String, Object&gt; context) {\n        return PLACEHOLDER_PATTERN.matcher(template).replaceAll(match -&gt; {\n            String key = match.group(1).trim();\n            return context.getOrDefault(key, \"\").toString();\n        });\n    }\n\n    public static void main(String[] args) {\n        String template = \"Hello, {{name}}! Your order #{{orderId}} for {{itemCount}} item(s) has been processed.\";\n        Map&lt;String, Object&gt; context = Map.of(\n            \"name\", \"John Doe\",\n            \"orderId\", 12345,\n            \"itemCount\", 3\n        );\n\n        String result = render(template, context);\n        System.out.println(result);\n        \/\/ \u51fa\u529b: Hello, John Doe! Your order #12345 for 3 item(s) has been processed.\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-96\">\n<p>\u3053\u306e\u7c21\u6613\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u306f\u4ee5\u4e0b\u306e\u7279\u5fb4\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-97\">\n<li><code>{{placeholder}}<\/code>\u5f62\u5f0f\u306e\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u30fc\u3092\u4f7f\u7528<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<li>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u30de\u30c3\u30d7\u304b\u3089\u5024\u3092\u53d6\u5f97\u3057\u3066\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u30fc\u3092\u7f6e\u63db<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<li>\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306e\u5834\u5408\u306f\u7a7a\u6587\u5b57\u5217\u306b\u7f6e\u63db<\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-100\">\n<p>\u3053\u306e\u3088\u3046\u306a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30a8\u30f3\u30b8\u30f3\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u81ea\u52d5\u751f\u6210\u3084\u52d5\u7684\u306aWeb\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u751f\u6210\u306a\u3069\u3001\u69d8\u3005\u306a\u5834\u9762\u3067\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-101\">\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u901a\u3058\u3066\u3001Java\u306ereplace\u30e1\u30bd\u30c3\u30c9\u3068\u305d\u306e\u95a2\u9023\u30c6\u30af\u30cb\u30c3\u30af\u304c\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30bf\u30b9\u30af\u3067\u3044\u304b\u306b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3068\u306a\u308b\u304b\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u9ad8\u3081\u3064\u3064\u3001\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u51e6\u7406\u3084\u52d5\u7684\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u751f\u6210\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<h2 class=\"wp-block-heading\" id=\"i-16\">5. replace\u30e1\u30bd\u30c3\u30c9\u306e\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u5bfe\u7b56<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\n<p>replace\u30e1\u30bd\u30c3\u30c9\u306f\u5f37\u529b\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u7279\u5b9a\u306e\u72b6\u6cc1\u4e0b\u3067\u306f\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3092\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001replace\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u6ce8\u610f\u3059\u3079\u304d\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3068\u3001\u305d\u308c\u3089\u306b\u5bfe\u3059\u308b\u52b9\u679c\u7684\u306a\u5bfe\u7b56\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<h3 class=\"wp-block-heading\" id=\"i-17\">5.1 NULL\u5024\u3068\u7a7a\u6587\u5b57\u5217\u306e\u53d6\u308a\u6271\u3044<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<p>NULL\u3068\u7a7a\u6587\u5b57\u5217\u306f\u7570\u306a\u308b\u6982\u5ff5\u3067\u3059\u304c\u3001\u3057\u3070\u3057\u3070\u6df7\u540c\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002replace\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u3053\u308c\u3089\u3092\u9069\u5207\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\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=\"\">public static String safeReplace(String original, String target, String replacement) {\n    if (original == null) {\n        return null;\n    }\n    return original.replace(\n        Objects.toString(target, \"\"),\n        Objects.toString(replacement, \"\")\n    );\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nSystem.out.println(safeReplace(null, \"a\", \"b\"));  \/\/ \u51fa\u529b: null\nSystem.out.println(safeReplace(\"hello\", null, \"world\"));  \/\/ \u51fa\u529b: hello\nSystem.out.println(safeReplace(\"hello\", \"l\", null));  \/\/ \u51fa\u529b: heo<\/pre>\n\n\n<div id=\"sgb-css-id-106\">\n<p>\u3053\u306e<code>safeReplace<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u3001NULL\u5024\u3092\u5b89\u5168\u306b\u51e6\u7406\u3057\u3001NullPointerException\u3092\u9632\u304e\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">5.2 \u7279\u6b8a\u6587\u5b57\u3068\u30a8\u30b9\u30b1\u30fc\u30d7\u30b7\u30fc\u30b1\u30f3\u30b9\u306e\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<p>replace\u30e1\u30bd\u30c3\u30c9\u3067\u6b63\u898f\u8868\u73fe\u306e\u7279\u6b8a\u6587\u5b57\uff08. * + ? \u7b49\uff09\u3092\u542b\u3080\u6587\u5b57\u5217\u3092\u7f6e\u63db\u3059\u308b\u5834\u5408\u3001\u4e88\u671f\u305b\u306c\u7d50\u679c\u3092\u62db\u304f\u53ef\u80fd\u6027\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=\"\">String text = \"1.23 * 4.56\";\nSystem.out.println(text.replaceAll(\".\", \"X\"));  \/\/ \u51fa\u529b: XXXXXXXXXXXXX\nSystem.out.println(text.replaceAll(\"\\\\*\", \"X\"));  \/\/ \u51fa\u529b: 1.23 X 4.56\n\n\/\/ Pattern.quote\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u306a\u7f6e\u63db\nString safe = text.replaceAll(Pattern.quote(\".\"), \"X\");\nSystem.out.println(safe);  \/\/ \u51fa\u529b: 1X23 * 4X56<\/pre>\n\n\n<div id=\"sgb-css-id-109\">\n<p><code>Pattern.quote()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u6b8a\u6587\u5b57\u3092\u30ea\u30c6\u30e9\u30eb\u3068\u3057\u3066\u6271\u3044\u3001\u610f\u56f3\u3057\u306a\u3044\u6b63\u898f\u8868\u73fe\u306e\u52d5\u4f5c\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<h3 class=\"wp-block-heading\" id=\"i-19\">5.3 Unicode\u6587\u5b57\u3068\u56fd\u969b\u5316\u5bfe\u5fdc\u3067\u306e\u6ce8\u610f\u70b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<p>\u56fd\u969b\u5316\u5bfe\u5fdc\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001Unicode\u6587\u5b57\u306e\u9069\u5207\u306a\u51e6\u7406\u304c\u4e0d\u53ef\u6b20\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 = \"\u3053\u3093\u306b\u3061\u306f\u3001\u4e16\u754c\uff01\";\nSystem.out.println(text.replaceAll(\"\\\\p{InHiragana}\", \"X\"));  \/\/ \u51fa\u529b: XXX\u306b\u3061\u306f\u3001\u4e16\u754c\uff01\n\n\/\/ \u6b63\u898f\u5316\u3092\u4f7f\u7528\u3057\u305f\u7f6e\u63db\nimport java.text.Normalizer;\n\nString normalized = Normalizer.normalize(text, Normalizer.Form.NFKC);\nSystem.out.println(normalized.replaceAll(\"\\\\p{InHiragana}\", \"X\"));  \/\/ \u51fa\u529b: XXX\u306b\u3061\u306f\u3001\u4e16\u754c\uff01<\/pre>\n\n\n<div id=\"sgb-css-id-112\">\n<p><code>Normalizer<\/code>\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u6587\u5b57\u5217\u3092\u6b63\u898f\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u7570\u306a\u308b\u8868\u73fe\u5f62\u5f0f\u306e\u6587\u5b57\uff08\u4f8b\uff1a\u5168\u89d2\u3068\u534a\u89d2\uff09\u3092\u7d71\u4e00\u7684\u306b\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<p>\u305d\u306e\u4ed6\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u306b\u3082\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p>1. \u975e\u5e38\u306b\u9577\u3044\u6587\u5b57\u5217\u306e\u51e6\u7406\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-115\">\n<li><code>StringBuilder<\/code>\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u6539\u5584\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-116\">\n<li>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u5834\u5408\u306f\u3001\u30b9\u30c8\u30ea\u30fc\u30e0\u51e6\u7406\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-117\">\n<p>2.\u5faa\u74b0\u53c2\u7167\u3084\u7121\u9650\u30eb\u30fc\u30d7\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-118\">\n<li>\u7f6e\u63db\u524d\u5f8c\u3067\u6587\u5b57\u5217\u9577\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u5909\u5316\u304c\u306a\u304f\u306a\u3063\u305f\u3089\u51e6\u7406\u3092\u7d42\u4e86\u3057\u307e\u3059\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-119\">\n<p>3.\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\uff1a<\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-120\">\n<li><code>StringBuffer<\/code>\uff08\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\uff09\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<li>\u53ef\u80fd\u306a\u9650\u308a\u3001\u4e0d\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-122\">\n<p>\u3053\u308c\u3089\u306e\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u5bfe\u7b56\u3092\u9069\u5207\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u56fd\u969b\u5316\u306b\u5bfe\u5fdc\u3057\u305fJava\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5e38\u306b\u5165\u529b\u5024\u306e\u691c\u8a3c\u3092\u884c\u3044\u3001\u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u3068\u30ed\u30ae\u30f3\u30b0\u3092\u5b9f\u88c5\u3057\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u3067\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3092\u30ab\u30d0\u30fc\u3059\u308b\u3053\u3068\u3092\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<h2 class=\"wp-block-heading\" id=\"i-20\">6. replace\u3068\u4ed6\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u306e\u9023\u643a<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-124\">\n<p>replace\u30e1\u30bd\u30c3\u30c9\u306f\u5f37\u529b\u3067\u3059\u304c\u3001\u4ed6\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306b\u8907\u96d1\u3067\u67d4\u8edf\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001replace\u3068\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u9023\u643a\u3055\u305b\u3066\u4f7f\u7528\u3059\u308b\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-125\">\n<h3 class=\"wp-block-heading\" id=\"i-21\">6.1 split()\u3068replace()\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u52a0\u5de5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-126\">\n<p><code>split()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u6587\u5b57\u5217\u3092\u7279\u5b9a\u306e\u30c7\u30ea\u30df\u30bf\u3067\u5206\u5272\u3057\u3001\u6587\u5b57\u5217\u306e\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u308c\u3092replace()\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u96d1\u306a\u6587\u5b57\u5217\u52a0\u5de5\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-127\">\n<p>\u4ee5\u4e0b\u306f\u3001CSV\u30c7\u30fc\u30bf\u306e\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u30c8\u30ea\u30e0\u3057\u3001\u7279\u5b9a\u306e\u6587\u5b57\u3092\u7f6e\u63db\u3059\u308b\u4f8b\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 csvLine = \"John Doe , 30 , New York , Software Engineer\";\nString[] fields = csvLine.split(\",\");\nString processedLine = Arrays.stream(fields)\n    .map(String::trim)\n    .map(field -&gt; field.replace(\"New York\", \"NY\"))\n    .collect(Collectors.joining(\", \"));\nSystem.out.println(processedLine);\n\/\/ \u51fa\u529b: John Doe, 30, NY, Software Engineer<\/pre>\n\n\n<div id=\"sgb-css-id-128\">\n<p>\u3053\u306e\u624b\u6cd5\u306f\u3001\u30ed\u30b0\u89e3\u6790\u3084\u30c7\u30fc\u30bf\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u306a\u3069\u3001\u591a\u304f\u306e\u5b9f\u8df5\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<h3 class=\"wp-block-heading\" id=\"i-22\">6.2 \u6b63\u898f\u8868\u73fe\u3068replace()\uff1areplaceAll()\u306e\u771f\u306e\u529b\u3092\u89e3\u653e<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<p><code>replaceAll()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u6b63\u898f\u8868\u73fe\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u8907\u96d1\u306a\u7f6e\u63db\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u96fb\u8a71\u756a\u53f7\u3092\u6a19\u6e96\u5f62\u5f0f\u306b\u5909\u63db\u3059\u308b\u4f8b\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 phoneNumbers = \"Call me at 1234567890 or (987) 654-3210\";\nString formattedNumbers = phoneNumbers.replaceAll(\"(\\\\d{3})(\\\\d{3})(\\\\d{4})\", \"($1) $2-$3\");\nSystem.out.println(formattedNumbers);\n\/\/ \u51fa\u529b: Call me at (123) 456-7890 or (987) 654-3210<\/pre>\n\n\n<div id=\"sgb-css-id-131\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u5f8c\u65b9\u53c2\u7167\uff08<code>$1<\/code>, <code>$2<\/code>, <code>$3<\/code>\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001\u30de\u30c3\u30c1\u3057\u305f\u6570\u5b57\u30b0\u30eb\u30fc\u30d7\u3092\u65b0\u3057\u3044\u5f62\u5f0f\u3067\u518d\u69cb\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-132\">\n<p>\u6b63\u898f\u8868\u73fe\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u8907\u96d1\u306a\u6b63\u898f\u8868\u73fe\u3084\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u3001<code>Pattern<\/code>\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u6b63\u898f\u8868\u73fe\u3092\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\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=\"\">Pattern pattern = Pattern.compile(\"(\\\\d{3})(\\\\d{3})(\\\\d{4})\");\nMatcher matcher = pattern.matcher(phoneNumbers);\nString formattedNumbers = matcher.replaceAll(\"($1) $2-$3\");<\/pre>\n\n\n<div id=\"sgb-css-id-133\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">6.3 Stream API\u3092\u6d3b\u7528\u3057\u305f\u9769\u65b0\u7684\u306a\u7f6e\u63db\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<p>Java 8\u3067\u5c0e\u5165\u3055\u308c\u305fStream API\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3088\u308a\u5ba3\u8a00\u7684\u3067\u67d4\u8edf\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u8907\u6570\u884c\u306e\u30c6\u30ad\u30b9\u30c8\u304b\u3089\u7279\u5b9a\u306e\u5358\u8a9e\u3092\u7f6e\u63db\u3057\u3001\u884c\u756a\u53f7\u3092\u4ed8\u4e0e\u3059\u308b\u4f8b\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 multiLineText = \"The quick brown fox\\njumps over the lazy dog\\nThe dog is also quick\";\nList&lt;String&gt; processedLines = Arrays.stream(multiLineText.split(\"\\n\"))\n    .map(line -&gt; line.replace(\"quick\", \"fast\"))\n    .map(line -&gt; line.replace(\"lazy\", \"energetic\"))\n    .map(String::toUpperCase)\n    .collect(Collectors.toList());\n\nString result = IntStream.range(0, processedLines.size())\n    .mapToObj(i -&gt; String.format(\"%d: %s\", i + 1, processedLines.get(i)))\n    .collect(Collectors.joining(\"\\n\"));\n\nSystem.out.println(result);\n\/\/ \u51fa\u529b:\n\/\/ 1: THE FAST BROWN FOX\n\/\/ 2: JUMPS OVER THE ENERGETIC DOG\n\/\/ 3: THE DOG IS ALSO FAST<\/pre>\n\n\n<div id=\"sgb-css-id-135\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>Stream<\/code>\u306e<code>map()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u8907\u6570\u306e\u5909\u63db\u3092\u9023\u9396\u3055\u305b\u3001\u6700\u5f8c\u306b<code>collect()<\/code>\u3067\u7d50\u679c\u3092\u96c6\u7d04\u3057\u3066\u3044\u307e\u3059\u3002<code>parallel()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u4e26\u5217\u51e6\u7406\u3059\u308b\u3053\u3068\u3082\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=\"\">List&lt;String&gt; processedLines = Arrays.stream(multiLineText.split(\"\\n\"))\n    .parallel()\n    .map(line -&gt; line.replace(\"quick\", \"fast\"))\n    .map(line -&gt; line.replace(\"lazy\", \"energetic\"))\n    .map(String::toUpperCase)\n    .collect(Collectors.toList());<\/pre>\n\n\n<div id=\"sgb-css-id-136\">\n<p>\u305f\u3060\u3057\u3001\u4e26\u5217\u51e6\u7406\u306f\u5e38\u306b\u52b9\u7387\u7684\u3068\u306f\u9650\u3089\u306a\u3044\u305f\u3081\u3001\u30c7\u30fc\u30bf\u91cf\u3084\u30bf\u30b9\u30af\u306e\u8907\u96d1\u3055\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u5224\u65ad\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-137\">\n<p>\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u67d4\u8edf\u306a\u6587\u5b57\u5217\u51e6\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5e38\u306b\u5ff5\u982d\u306b\u7f6e\u304d\u3001\u5fc5\u8981\u4ee5\u4e0a\u306b\u8907\u96d1\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u306a\u3044\u3088\u3046\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002\u307e\u305f\u3001\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001Apache Commons Lang\u306eStringUtils\u3084Google Guava\u306eStrings\u306a\u3069\u306e\u5916\u90e8\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4f7f\u7528\u3082\u691c\u8a0e\u3059\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u3053\u308c\u3089\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3001\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u30bf\u30b9\u30af\u3092\u7c21\u7565\u5316\u3057\u3001\u30d0\u30b0\u306e\u5c11\u306a\u3044\u30b3\u30fc\u30c9\u306e\u4f5c\u6210\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<h2 class=\"wp-block-heading\" id=\"i-24\">\u7d50\u8ad6<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java \u306e replace \u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3001\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002\u6587\u5b57\u5217\u64cd\u4f5c\u306f Java \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u3067\u3042\u308a\u3001replace \u30e1\u30bd\u30c3\u30c9\u306f\u305d\u306e\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-140\">\n<p>\u79c1\u305f\u3061\u306f\u4ee5\u4e0b\u306e\u4e3b\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u5b66\u3073\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\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\u3093\u3060\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-141\">\n<li>replace \u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068 replaceAll \u3068\u306e\u9055\u3044<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<li>\u6b63\u898f\u8868\u73fe\u3092\u6d3b\u7528\u3057\u305f\u9ad8\u5ea6\u306a\u7f6e\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u64cd\u4f5c\u65b9\u6cd5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<li>\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<li>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u3078\u306e\u5bfe\u51e6\u6cd5\u3068\u6ce8\u610f\u70b9<\/li>\n<\/div>\n\n\n<li>\u4ed6\u306e\u6587\u5b57\u5217\u64cd\u4f5c\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u52b9\u679c\u7684\u306a\u9023\u643a<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<p>\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5805\u7262\u306a Java \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u65e5\u3005\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u4e2d\u3067\u3001\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7a4d\u6975\u7684\u306b\u5b9f\u8df5\u3057\u3001\u7d99\u7d9a\u7684\u306b\u6539\u5584\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\n<p>\u6587\u5b57\u5217\u64cd\u4f5c\u306f\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u3001\u30e6\u30fc\u30b6\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306a\u3069\u3001\u591a\u5c90\u306b\u308f\u305f\u308b\u9818\u57df\u3067\u5fc5\u8981\u3068\u3055\u308c\u308b\u30b9\u30ad\u30eb\u3067\u3059\u3002\u4eca\u56de\u5b66\u3093\u3060\u5185\u5bb9\u3092\u57fa\u790e\u3068\u3057\u3066\u3001\u3055\u3089\u306b\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u51e6\u7406\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u3001\u95a2\u9023\u3059\u308b Java \u306e\u6a5f\u80fd\u306b\u3064\u3044\u3066\u3082\u63a2\u6c42\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<p>Java \u958b\u767a\u8005\u3068\u3057\u3066\u306e\u30ad\u30e3\u30ea\u30a2\u306b\u304a\u3044\u3066\u3001\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u30de\u30b9\u30bf\u30fc\u306f\u5927\u304d\u306a\u5f37\u307f\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u304c\u3001\u7686\u3055\u3093\u306e\u6280\u8853\u7684\u6210\u9577\u306e\u4e00\u52a9\u3068\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3001\u6587\u5b57\u5217\u64cd\u4f5c\u306f\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u91cd\u8981\u306a\u4f5c\u696d\u3067\u3059\u3002\u305d\u306e\u4e2d\u3067\u3082replace\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6587\u5b57\u5217\u306e\u4e00\u90e8\u3092\u5225\u306e\u6587\u5b57\u5217\u306b\u7f6e\u304d\u63db\u3048\u308b\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u958b\u767a\u8005\u306e\u305f\u3081\u306ereplace\u30e1 &#8230; <\/p>\n","protected":false},"author":1,"featured_media":3042,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,70,66],"tags":[],"class_list":{"0":"post-353","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\/353","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=353"}],"version-history":[{"count":15,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/353\/revisions"}],"predecessor-version":[{"id":374,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/353\/revisions\/374"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/media\/3042"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}