{"id":75981,"date":"2020-09-23T04:31:27","date_gmt":"2020-09-23T04:31:27","guid":{"rendered":"https:\/\/blog.jetbrains.com\/?post_type=idea&#038;p=75981"},"modified":"2020-09-23T05:15:47","modified_gmt":"2020-09-23T05:15:47","slug":"everyday-refactorings-in-intellij-idea-ja","status":"publish","type":"idea","link":"https:\/\/blog.jetbrains.com\/ja\/idea\/2020\/09\/everyday-refactorings-in-intellij-idea-ja\/","title":{"rendered":"IntelliJ IDEA \u3067\u65e5\u3005\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u5feb\u9069\u306b"},"content":{"rendered":"<p>\u30d0\u30b0\u306e\u4fee\u6b63\u3001\u53ef\u8aad\u6027\u306e\u6539\u5584\u3001\u65b0\u6a5f\u80fd\u306e\u8ffd\u52a0\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u7406\u7531\u3067\u4f5c\u696d\u4e2d\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002 \u3053\u306e\u30d6\u30ed\u30b0\u3067\u306f\u3001\u65e5\u3005\u306e\u4f5c\u696d\u3067\u3088\u304f\u5229\u7528\u3055\u308c\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<p><iframe loading=\"lazy\" title=\"IntelliJ IDEA\u3002 \u3088\u304f\u5229\u7528\u3055\u308c\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\uff082020\uff09\" src=\"https:\/\/www.youtube.com\/embed\/rPq7fBo5JVs?feature=oembed\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p><em>\u3053\u306e\u30d6\u30ed\u30b0\u8a18\u4e8b\u3067\u306f\u3001\u52d5\u753b\u3068\u540c\u3058\u7d20\u6750\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002 \u52d5\u753b\u3092\u898b\u308b\u3088\u308a\u3082\u8a18\u4e8b\u3092\u8aad\u3080\u307b\u3046\u3092\u597d\u3080\u65b9\u304c\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u7d20\u65e9\u304f\u76ee\u3092\u901a\u305b\u308b\u3088\u3046\u306b\u63d0\u4f9b\u3055\u308c\u3066\u304a\u308a\u3001\u30b3\u30fc\u30c9\u30b5\u30f3\u30d7\u30eb\u3068\u8ffd\u52a0\u60c5\u5831\u3078\u306e\u30ea\u30f3\u30af\u3082\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/em><\/p>\n<p>\u3053\u306e\u30d6\u30ed\u30b0\u3067\u4f7f\u7528\u3055\u308c\u308b\u30b3\u30fc\u30c9\u306f<a href=\"https:\/\/github.com\/malagupta\/RefactoringDemo\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089\u304b\u3089\u5165\u624b<\/a>\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u540d\u524d\u306e\u5909\u66f4<\/h2>\n<p>\u30af\u30e9\u30b9\u30d5\u30a1\u30a4\u30eb\u3067\u30a8\u30c7\u30a3\u30bf\u4e0a\u3067\u76f4\u63a5\u540d\u524d\u3092\u5909\u66f4\u3057\u3066\u884c\u3046\u540d\u524d\u5909\u66f4\u306f\u3001\u5b89\u5168\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 \u305f\u3068\u3048\u3070\u3001 <a href=\"https:\/\/github.com\/malagupta\/RefactoringDemo\/blob\/master\/out\/production\/RefactoringDemo\/com\/jetbrains\/Bug.class\" target=\"_blank\" rel=\"noopener\">Bug \u30af\u30e9\u30b9<\/a> \u3092\u30a8\u30c7\u30a3\u30bf\u30fc\u3067 ABug \u306b\u5909\u66f4\u3059\u308b\u3068\u3001\u305d\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3059\u3079\u3066\u306e\u30b3\u30fc\u30c9\u3068\u306e\u9593\u3067\u53c2\u7167\u95a2\u4fc2\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u3001\u66f4\u65b0\u30df\u30b9\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001 <a href=\"https:\/\/blog.jetbrains.com\/idea\/2020\/06\/intellij-idea-2020-2-eap-5-java-15-related-problems-intentions-preview-and-more\/\">IntelliJ IDEA 2020.2 \u4ee5\u964d\u3067\u306f\u3001\u30a8\u30c7\u30a3\u30bf\u30fc\u306b &#8220;related problems(\u95a2\u9023\u3059\u308b\u554f\u984c)&#8221;<\/a> \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/rename_abug.png\" alt=\"Bug \u30af\u30e9\u30b9\u304b\u3089 ABug \u3078\u306e\u540d\u524d\u5909\u66f4\" \/><\/p>\n<p>\u3053\u3053\u3067\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<a href=\"https:\/\/pleiades.io\/help\/idea\/rename-refactorings.html#inplace_rename&amp;gsc.tab=0\" target=\"_blank\" rel=\"noopener\">In-place<br \/>\nrename\uff08\u30a4\u30f3\u30d7\u30ec\u30fc\u30b9\u540d\u524d\u5909\u66f4\uff09\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/a>\uff08\u5c02\u7528\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3092\u958b\u304b\u305a\u306b\u884c\u3048\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\uff09\u304c\u53ef\u80fd\u306a\u5834\u5408\u3001\uff08\u5de6\u5074\uff09\u30ac\u30bf\u30fc\u306b\u5f37\u8abf\u8868\u793a\u3055\u308c\u307e\u3059\u3002 \u30ac\u30bf\u30fc\u306e <strong>R<\/strong> \u30a2\u30a4\u30b3\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001Bug \u306e\u3059\u3079\u3066\u306e\u4f7f\u7528\u7b87\u6240\u3092 ABug \u306b<a href=\"https:\/\/pleiades.io\/help\/idea\/refactoring-source-code.html#refactoring_preview\" target=\"_blank\" rel=\"noopener\">\u540d\u524d\u5909\u66f4\u3059\u308b\u30d7\u30ec\u30d3\u30e5\u30fc<\/a>\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/rename_with_preview.png\" alt=\"\u30d7\u30ec\u30d3\u30e5\u30fc\u306b\u3088\u308b\u30af\u30e9\u30b9\u540d\u306e\u5909\u66f4\" \/><\/p>\n<p>\u3053\u306e\u5834\u5408\u3001IntelliJ IDEA \u306f\u3001\u985e\u4f3c\u3059\u308b\u540d\u524d\u3092\u6301\u3064\u5909\u6570\u3082\u898b\u3064\u3051\u51fa\u3057\u3066\u304f\u308c\u308b\u305f\u3081\u3001\u3069\u308c\u3092\u66f4\u65b0\u3059\u308b\u306e\u304b\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u306f\u3001\u30a8\u30c7\u30a3\u30bf\u30fc\u3067\u30af\u30e9\u30b9\u540d\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u3001<strong>\u2325\u23ce<\/strong> \u307e\u305f\u306f <strong>Alt<\/strong>+<strong>Enter<\/strong><br \/>\n\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u3053\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u7e70\u308a\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001macOS \u3067\u306f <strong>\u21e7F6<\/strong>\u3001Windows\/Linux \u3067\u306f <strong>Shift<\/strong>+<strong>F6<\/strong><br \/>\n\u3092\u4f7f\u7528\u3057\u3066\u3001\u540d\u524d\u5909\u66f4\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u547c\u3073\u51fa\u3059\u3068\u3001IntelliJ IDEA \u306f\u3001\u30af\u30e9\u30b9\u3001\u30e1\u30bd\u30c3\u30c9\u3001\u304a\u3088\u3073\u5909\u6570\u306e<a href=\"https:\/\/pleiades.io\/help\/idea\/rename-refactorings.html\" target=\"_blank\" rel=\"noopener\">\u4ee3\u66ff\u540d\u3092\u63d0\u6848<\/a>\u3057\u307e\u3059\u3002 \u65b0\u3057\u3044\u540d\u524d\u3092\u9078\u629e\u3057\u305f\u5834\u5408\u3067\u3082\u3001IntelliJ IDEA<br \/>\n\u306b\u3088\u3063\u3066\u3001\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u5b89\u5168\u306b\u5b8c\u4e86\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public class Bug {\r\n    private long id;\r\n    private String description;\r\n\r\n    public Bug(long id, String description) {\r\n        this.id = id;\r\n        this.description = description;\r\n    }\r\n\r\n    public long getId() {\r\n        return id;\r\n    }\r\n\r\n    public String getDescription() {\r\n        return description;\r\n    }\r\n}<\/pre>\n<p>\u305f\u3068\u3048\u3070\u3001\u30d5\u30a3\u30fc\u30eb\u30c9 <code>description<\/code> \u3092 <code>desc<\/code> \u306b\u540d\u524d\u5909\u66f4\u3059\u308b\u5834\u5408\u3001IntelliJ IDEA \u306f\u3001\u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c getter \u3068 setter<br \/>\n\u30e1\u30bd\u30c3\u30c9\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u691c\u51fa\u3057\u3001\u305d\u308c\u3089\u3092\u66f4\u65b0\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5c0b\u306d\u307e\u3059\u3002 \u307e\u305f\u3001\u30e1\u30bd\u30c3\u30c9\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3067\u306e\u4f7f\u7528\u7b87\u6240\u3082\u66f4\u65b0\u3057\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/rename_variable.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/rename_variable.gif\" \/><\/p>\n<p>\u30e1\u30bd\u30c3\u30c9 <code>getItems<\/code> \u3092\u5b9a\u7fa9\u3059\u308b <code>View<\/code> \u3068\u3044\u3046\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u3063\u3066\u4f5c\u696d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 macOS \u3067\u306f <strong>\u2318B<\/strong><br \/>\n\u3092\u3001Windows\/Linux \u3067\u306f <strong>Ctrl<\/strong>+<strong>B<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u3001<a href=\"https:\/\/pleiades.io\/help\/idea\/find-highlight-usages.html\" target=\"_blank\" rel=\"noopener\">\u305d\u308c\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u7b87\u6240\u306b\u79fb\u52d5<\/a>\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30af\u30e9\u30b9<br \/>\n<code>ViewImpl<\/code> \u3067\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><code>View<\/code> \u3068\u3044\u3046\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3001macOS \u3067\u306f <strong>\u21e7F6<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f<br \/>\n<strong>Shift<\/strong>+<strong>F6<\/strong> \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30e1\u30bd\u30c3\u30c9 <code>getItems<\/code> \u304c <code>getItemsList<\/code> \u306b\u540d\u524d\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<br \/>\n<strong>Enter<\/strong> \u3092\u62bc\u3059\u3068\u3001\u3053\u306e\u5b9f\u88c5\u306f\u3001<code>ViewImpl<\/code> \u30af\u30e9\u30b9\u3067\u66f4\u65b0\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/rename_interface.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/rename_interface.gif\" \/><\/p>\n<p>\u307e\u305f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a6\u30a3\u30f3\u30c9\u30a6\uff08macOS\u3067\u306f<strong>\u23181<\/strong>\u3001Windows\/Linux\u3067\u306f<strong>Alt+1<\/strong>\uff09\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066 macOS \u3067\u306f <strong>\u21e7F6<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f <strong>Shift<\/strong>+<strong>F6<\/strong><br \/>\n\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30af\u30e9\u30b9\u3001\u30d1\u30c3\u30b1\u30fc\u30b8\u3001\u30d5\u30a1\u30a4\u30eb\u3001\u307e\u305f\u306f\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u540d\u524d\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h2>\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u306e\u5909\u66f4<\/h2>\n<p><a href=\"https:\/\/pleiades.io\/help\/idea\/change-signature.html\" target=\"_blank\" rel=\"noopener\">\u30af\u30e9\u30b9\u307e\u305f\u306f\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u3092\u5b89\u5168\u306b\u5909\u66f4<\/a>\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002 <code>BugReport<\/code><br \/>\n\u306e\u30e1\u30bd\u30c3\u30c9 <code>binaryStrings<\/code> \u306f\u3001String\u578b\u5f15\u6570\u3092\u53d7\u3051\u5165\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public boolean binaryStrings(String b) {\r\n    Stack&lt;Character&gt; s = new Stack&lt;&gt;();\r\n    for (char c : b.toCharArray())\r\n        if (s.empty() || !s.peek().equals(c))\r\n            s.push(c);\r\n        else\r\n            s.pop();\r\n    return s.empty();\r\n}<\/pre>\n<p>\u30e1\u30bd\u30c3\u30c9 <code>binaryStrings<\/code> \u306b\u305f\u3068\u3048\u3070 int \u578b\u306e\u30ab\u30a6\u30f3\u30bf\u306a\u3069\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002 \u3053\u308c\u306f\u30a4\u30f3\u30d7\u30ec\u30fc\u30b9\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3067\u3042\u308b\u305f\u3081\u3001\u307e\u305f\u30ac\u30bf\u30fc\u9818\u57df\u306b R \u306e\u30a2\u30a4\u30b3\u30f3\u304c\u5f37\u8abf\u8868\u793a\u3055\u308c\u307e\u3059\u3002<br \/>\n\u30ac\u30bf\u30fc\u306e\u30a2\u30a4\u30b3\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u8aad\u307f\u51fa\u3057\u5143\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u3092\u66f4\u65b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/change_method_signature.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/change_method_signature.gif\" \/><\/p>\n<p>\u307e\u305f\u3001macOS \u3067\u306f <strong>\u2325\u23ce<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f <strong>Alt<\/strong>+<strong>Enter<\/strong><br \/>\n\u3092\u4f7f\u3048\u3070\u3001\u30e1\u30bd\u30c3\u30c9\u30b7\u30b0\u30cd\u30c1\u30e3\u3092\u66f4\u65b0\u3057\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u5024\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30bd\u30c3\u30c9\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u306f\u3001macOS \u3067\u306f <strong>\u2318F6<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f <strong>Ctrl<\/strong>+<strong>F6<\/strong> \u3092\u62bc\u3057\u3066 <a href=\"https:\/\/pleiades.io\/help\/idea\/change-signature.html\" target=\"_blank\" rel=\"noopener\">Change Signature\uff08\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u306e\u5909\u66f4\uff09\u30c0\u30a4\u30a2\u30ed\u30b0<\/a>\u3092\u547c\u3073\u51fa\u3057\u3066\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30d6\u30fc\u30eb\u578b\u30d1\u30e9\u30e1\u30fc\u30bf <code>state<\/code> \u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u5024 &#8220;true&#8221; \u306b\u3057\u3066\u8ffd\u52a0\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 \u3053\u306e\u30c0\u30a4\u30a2\u30ed\u30b0\u3092\u4f7f\u3046\u3068\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u9806\u5e8f\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u3088\u308b\u59d4\u8b72\u3092\u9078\u629e\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3082\u3042\u308a\u307e\u3059\u3002 \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u969b\u3001\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/add_overload_bool.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/add_overload_bool.gif\" \/><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public class MyMap {\r\n    int count = 0;\r\n\r\n    public int getCount() {\r\n        return count;\r\n    }\r\n\r\n    public void setCount(int Count) {\r\n        this.count = count;\r\n    }\r\n\r\n    public static void main(String[] args) {\r\n        MyMap myMap = new MyMap();\r\n        System.out.println(myMap.getCount());\r\n    }\r\n}<\/pre>\n<p>\u3053\u306e <code>MyMap<\/code> \u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30e9\u30b9\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u306e\u5909\u66f4\u304c\u305d\u306e\u30af\u30e9\u30b9\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 macOS \u3067\u306f <strong>\u2318F6<\/strong><br \/>\n\u3092\u3001Windows\/Linux \u3067\u306f <strong>Ctrl<\/strong>+<strong>F6<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u3001\u30af\u30e9\u30b9\u30b7\u30b0\u30cd\u30c1\u30e3\u30fc\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30c7\u30d5\u30a9\u30eb\u30c8\u5024<br \/>\n<code>Integer<\/code> \u306e <code>K<\/code> \u3068\u30c7\u30d5\u30a9\u30eb\u30c8\u5024 <code>String<\/code> \u306e <code>V<\/code> \u3068\u3044\u3046 2 \u3064\u306e\u6c4e\u7528\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002<br \/>\n\u30af\u30e9\u30b9\u3092\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u3068\u3001<code>MyMap<\/code> \u306e\u4f7f\u7528\u7b87\u6240\u304c\u5909\u5316\u3057\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/change_signature.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/change_signature.gif\" \/><\/p>\n<h2>\u30e1\u30bd\u30c3\u30c9\u306e\u62bd\u51fa<\/h2>\n<p><a href=\"https:\/\/pleiades.io\/help\/idea\/extract-method.html\" target=\"_blank\" rel=\"noopener\">Extract method\uff08\u30e1\u30bd\u30c3\u30c9\u306e\u62bd\u51fa\uff09\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/a>\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u77ed\u304f\u3057\u3001\u8aad\u307f\u3084\u3059\u304f\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public boolean binaryStrings(String b) {\r\n    Stack&lt;Character&gt; s = new Stack&lt;&gt;();\r\n    for (char c : b.toCharArray())\r\n        if (s.empty() || !s.peek().equals(c))\r\n            s.push(c);\r\n        else\r\n            s.pop();\r\n    return s.empty();\r\n}<\/pre>\n<p>\u307e\u3068\u307e\u3063\u305f\u51e6\u7406\u306b\u3067\u304d\u305d\u3046\u306a <code>binaryStrings<\/code> \u30e1\u30bd\u30c3\u30c9\u5185\u306e\u30b3\u30fc\u30c9\u3092\u9078\u629e\u3057\u307e\u3059\u3002 macOS \u3067\u306f <strong>\u2325\u2318M<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f<br \/>\n<strong>Ctrl<\/strong>+<strong>Alt<\/strong>+<strong>M<\/strong> \u306e\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3053\u306e\u30b3\u30fc\u30c9\u3092\u5225\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u62bd\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30d6\u30ed\u30c3\u30af\u304c\u4f7f\u7528\u3059\u308b\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u307e\u305f\u306f\u30e1\u30bd\u30c3\u30c9\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u5225\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3055\u308c\u307e\u3059\u3002 \u305f\u3068\u3048\u3070\u30e1\u30bd\u30c3\u30c9\u540d manipulateStack<br \/>\n\u306e\u578b\u3068\u62bd\u51fa\u3057\u305f\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u3078\u306e\u547c\u3073\u51fa\u3057\u3068\u7f6e\u304d\u63db\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/extract_method.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/extract_method.gif\" \/><\/p>\n<p>\u30b3\u30fc\u30c9\u3092\u9078\u629e\u3057\u3066\u3001macOS \u3067\u306f <strong>\u2325\u23ce<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f <strong>Alt<\/strong>+<strong>Enter<\/strong><br \/>\n\u3092\u4f7f\u7528\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u62bd\u51fa\u3092\u9078\u629e\u3059\u308b\u3068\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u62bd\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u30e1\u30bd\u30c3\u30c9\u306e\u30a4\u30f3\u30e9\u30a4\u30f3\u5316<\/h2>\n<p><a href=\"https:\/\/pleiades.io\/help\/idea\/inline-method.html\" target=\"_blank\" rel=\"noopener\">Inline method\uff08\u30e1\u30bd\u30c3\u30c9\u306e\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\uff09\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/a>\u306f\u3001Extract<br \/>\nMethod\uff08\u30e1\u30bd\u30c3\u30c9\u306e\u62bd\u51fa\uff09\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u9006\u306e\u3053\u3068\u3092\u884c\u3044\u307e\u3059\u3002 \u4eca\u4f5c\u6210\u3057\u305f\u30e1\u30bd\u30c3\u30c9 <code>manipulateStack<\/code> \u3092\u3001macOS \u3067\u306f <strong>\u2325\u2318N<\/strong>\u3001Windows\/Linux<br \/>\n\u3067\u306f <strong>Ctrl<\/strong>+<strong>Alt<\/strong>+<strong>N<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30e1\u30bd\u30c3\u30c9\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u524a\u9664\u3059\u308b\u304b\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u4f8b\u3067\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u524a\u9664\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/inline_method.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/inline_method.gif\" \/><\/p>\n<p>\u3067\u3082\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3059\u308b\u306e\u306f\u306a\u305c\u3067\u3057\u3087\u3046\u304b\uff1f \u305f\u3068\u3048\u3070\u3001\u4e0d\u8981\u306a\u30ea\u30c0\u30a4\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u9664\u53bb\u3059\u308b\u5834\u5408\u3084\u3001\u3046\u307e\u304f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u306a\u304b\u3063\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3057\u3066\u3082\u3046\u4e00\u5ea6\u62bd\u51fa\u3057\u76f4\u3059\u5834\u5408\u306a\u3069\u306b\u3001\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u5b9a\u6570\u306e\u5c0e\u5165<\/h2>\n<p>\u88fd\u54c1\u30b3\u30fc\u30c9\u3067\u306f\u4e00\u822c\u7684\u306b\u306f\u30ea\u30c6\u30e9\u30eb\u5024\u3088\u308a\u3082\u5b9a\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u304c\u63a8\u5968\u3055\u308c\u308b\u305f\u3081\u3001<a href=\"https:\/\/pleiades.io\/help\/idea\/extract-constant.html\" target=\"_blank\" rel=\"noopener\">\u5b9a\u6570\u3092\u5c0e\u5165<\/a>\u3059\u308b\u305f\u3081\u306b\u30b3\u30fc\u30c9\u3092\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public static boolean beautifulBinaryStrings(String s) {\r\n    while (!s.equals(s = s.replaceAll(\"AA|BB\", \"\"))) {\r\n        System.out.println(s);\r\n    }\r\n    return s.isEmpty();\r\n}<\/pre>\n<p>\u30e1\u30bd\u30c3\u30c9 <code>beautifulBinaryStrings<\/code> \u306f\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u5024\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 macOS \u3067\u306f <strong>\u2325\u2318C<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f <strong>Ctrl<\/strong>+<strong>Alt<\/strong>+<strong>C<\/strong><br \/>\n\u306e\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3053\u306e\u5024\u3092\u5b9a\u6570\u306b\u62bd\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>IntelliJ IDEA \u306f\u3001\u30ea\u30c6\u30e9\u30eb\u5024\u306b\u57fa\u3065\u3044\u3066\u5b9a\u6570\u540d\u3092\u63d0\u6848\u3057\u307e\u3059\u3002 \u3053\u3053\u3067\u306f\u6700\u521d\u306e\u540d\u524d\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3059\u3002 \u5fc5\u8981\u3067\u3042\u308c\u3070\u3001\u3053\u306e\u5b9a\u6570\u3092\u5225\u306e\u30af\u30e9\u30b9\u306b\u79fb\u52d5\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/intro_constant.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/intro_constant.gif\" \/><\/p>\n<h2>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5c0e\u5165<\/h2>\n<p>\u3053\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u3001<a href=\"https:\/\/pleiades.io\/help\/idea\/extract-field.html#extract_field_example\" target=\"_blank\" rel=\"noopener\">\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5c0e\u5165\u307e\u305f\u306f\u62bd\u51fa<\/a>\u3057\u3001\u521d\u671f\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><code>ViewImpl<\/code> \u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9 <code>getItemsList<\/code> \u306f\u3001\u5b9a\u6570 <code>0<\/code> \u3068 <code>4<\/code> \u3092\u4f7f\u7528\u3057\u3066\u30ea\u30b9\u30c8\u306e\u30b5\u30d6\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public class ViewImpl implements View {\r\n   @Override\r\n   public List&lt;Integer&gt; getItemsList() {\r\n       return List.of(1, 2, 3, 4, 5).subList(0,4);\r\n   }\r\n}<\/pre>\n<p>\u3053\u308c\u3089\u3092\u5b9a\u6570\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u9593\u3067\u7570\u306a\u308b\u5024\u3092\u6301\u3066\u308b\u3088\u3046\u306b\u3001macOS \u3067\u306f <strong>\u2325\u2318F<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f<br \/>\n<strong>Ctrl<\/strong>+<strong>Alt<\/strong>+<strong>F<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u3001\u3053\u308c\u3089\u306e\u5024\u3092\u683c\u7d0d\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/intro_field.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/intro_field.gif\" \/><\/p>\n<h2>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u62bd\u51fa<\/h2>\n<p><a href=\"https:\/\/pleiades.io\/help\/idea\/extract-parameter.html\" target=\"_blank\" rel=\"noopener\">Extract parameter\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u62bd\u51fa\uff09\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/a>\u3067\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u306e\u5b9a\u6570\u307e\u305f\u306f\u5f0f\u3092\u9078\u629e\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\uff08\u5f15\u6570\uff09\u3068\u3057\u3066\u6e21\u3055\u308c\u308b\u3088\u3046\u306b\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u6700\u521d\u306b\uff08\u524d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8aac\u660e\u3057\u305f<strong>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5c0e\u5165<\/strong>\u3092\u884c\u3044\uff09<code>toIndex<\/code> \u3068\u547c\u3070\u308c\u308b 2 \u3064\u76ee\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5c0e\u5165\u306b\u3088\u308b\u5909\u66f4\u304c <code>getItemsList<\/code> \u30e1\u30bd\u30c3\u30c9\u306b\u9069\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public class ViewImpl implements View {\r\n   private final int fromIndex;\r\n   private final int toIndex;\r\n\r\n   public ViewImpl() {\r\n       fromIndex = 0;\r\n       toIndex = 4;\r\n   }\r\n\r\n   public List&lt;Integer&gt; getItemsList() {\r\n       return List.of(1, 2, 3, 4, 5).subList(fromIndex, toIndex);\r\n   }\r\n}<\/pre>\n<p><code>getItemsList<\/code> \u30e1\u30bd\u30c3\u30c9\u306b\u6ce8\u76ee\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u5f0f <code>List.of(1,2,3,4,5)<\/code> \u3092\u5f15\u6570\u3068\u3057\u3066\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 \u30e1\u30bd\u30c3\u30c9\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u578b\u306f\u3001\u9078\u629e\u3057\u305f\u5f0f\u306e\u578b\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/extract_param_first_option.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/extract_param_first_option.gif\" \/><\/p>\n<p>\u307e\u305f\u3001 Delegate via method overloading\uff08\u30e1\u30bd\u30c3\u30c9\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3092\u59d4\u8b72\uff09\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3068\u3001\u5143\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4fdd\u6301\u3057\u305f\u307e\u307e\u30012\u3064\u76ee\u306e\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u4ed8\u304d\u306e\uff09\u30e1\u30bd\u30c3\u30c9\u306e\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u3064\u307e\u308a\u3001\u3044\u305a\u308c\u306e\u30e1\u30bd\u30c3\u30c9\u3082\u3001\u547c\u3073\u51fa\u3057\u5074\u306b\u5fdc\u3058\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/extract_param_second_option.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/extract_param_second_option.gif\" \/><\/p>\n<p>Extract parameter\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u62bd\u51fa\uff09\u306f\u3001\u5f0f\u3092\u672c\u6765\u3042\u308b\u3079\u304d\u5834\u6240\u306b\u79fb\u52d5\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u30e1\u30bd\u30c3\u30c9\u307e\u305f\u306f\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u3092\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u3059\u308b\u4e0a\u3067\u5f79\u7acb\u3061\u307e\u3059\u3002 \u307e\u305f\u3001\u7406\u89e3\u3057\u3084\u3059\u3044\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u5909\u6570\u306e\u5c0e\u5165<\/h2>\n<p>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001<a href=\"https:\/\/pleiades.io\/help\/idea\/extract-variable.html\" target=\"_blank\" rel=\"noopener\">\u5909\u6570\u3092\u62bd\u51fa<\/a>\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<br \/>\n\u5f0f\u3092\u9069\u5207\u306a\u540d\u524d\u304c\u4ed8\u3051\u3089\u308c\u305f\u5909\u6570\u306b\u79fb\u52d5\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"\">public ContextActionsWithAltEnter(double cityPopulation) {\r\n    if (cityPopulation &gt; 0x1.2016eb678a2p43 &amp;&amp; cityPopulation &lt; 987677.8) {\r\n        if (cityPopulation % 5 == 0) {\r\n            this.cityPopulation \/= 2;\r\n        }\r\n    }\r\n    this.cityPopulation = cityPopulation;\r\n}<\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f<code>ContextActionsWithAltEnter<\/code> \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e if \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306f\u591a\u5c11\u8907\u96d1\u306b\u898b\u3048\u308b\u307e\u3059\u3002\u3053\u306e\u6761\u4ef6\u5f0f\u3092\u9078\u629e\u3057\u3001macOS \u3067\u306f <strong>\u2325\u2318V<\/strong><br \/>\n\u3092\u3001Windows\/Linux \u3067\u306f <strong>Ctrl<\/strong>+<strong>Alt<\/strong>+<strong>V<\/strong> \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 <code>lowerLimit<\/code><br \/>\n\u306a\u3069\u306e\u308f\u304b\u308a\u3084\u3059\u3044\u540d\u524d\u3092\u6307\u5b9a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 \u307e\u305f\u30012 \u3064\u76ee\u306e\u6761\u4ef6\u3082\u540c\u69d8\u306b\u5909\u6570\u306b\u62bd\u51fa\u3057\u3001<code>upperLimit<\/code> \u3092\u540d\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u62bd\u51fa\u3055\u308c\u305f\u5909\u6570\u306f\u5fc5\u8981\u3067\u3042\u308c\u3070 <code>final<\/code><br \/>\n\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Java 10 \u4ee5\u964d\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f <code>var<\/code> \u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-55173 size-full\" style=\"border: 1px solid #AAAAAA;\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/introduce_variable.png\" alt=\"\u5909\u6570\u540d\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\" width=\"750\" height=\"300\" data-gif-src=\"https:\/\/resources.jetbrains.com\/storage\/products\/blog\/wp-content\/uploads\/Java\/introduce_variable.gif\" \/><\/p>\n<p>\u4f55\u306e\u305f\u3081\u306e\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u308b\u306e\u304b\u3001\u898b\u901a\u3057\u306e\u3088\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<h2>\u5b89\u5168\u306a\u524a\u9664<\/h2>\n<p>\u4f7f\u7528\u3057\u306a\u304f\u306a\u3063\u305f\u30d5\u30a1\u30a4\u30eb\u3084\u30b7\u30f3\u30dc\u30eb\u304c\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u3042\u308b\u5834\u5408\u306f\u3001<a href=\"https:\/\/pleiades.io\/help\/idea\/safe-delete.html\" target=\"_blank\" rel=\"noopener\">\u5b89\u5168\u306b\u524a\u9664<\/a>\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u524a\u9664\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u307e\u305f\u306f\u30af\u30e9\u30b9\u3092\u9078\u629e\u3057\u305f\u3089\u3001macOS \u3067\u306f <strong>\u2318\u2326<\/strong> \u3092\u3001Windows\/Linux \u3067\u306f <strong>Alt<\/strong>+<strong>Delete<\/strong><br \/>\n\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 \u30ea\u30bd\u30fc\u30b9\u3092\u524a\u9664\u3059\u308b\u524d\u306b\u3001IntelliJ IDEA \u306b\u3088\u3063\u3066\u305d\u308c\u3089\u3092\u524a\u9664\u3057\u3066\u3082\u5b89\u5168\u3067\u3042\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2020\/08\/safe_delete.png\" alt=\"Safe Delete\uff08\u5b89\u5168\u306a\u524a\u9664\uff09\" \/><\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>IntelliJ IDEA \u306b\u306f\u5f37\u529b\u306a\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u6a5f\u80fd\u304c\u5099\u308f\u3063\u3066\u304a\u308a\u3001\u65e5\u3005\u306e\u4f5c\u696d\u3067\u30b3\u30fc\u30c9\u3092\u5b89\u5168\u306b\u6539\u5584\u3059\u308b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u9b54\u6cd5\u306e\u5f3e\u4e38\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 \u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306b\u3088\u3063\u3066\u30b3\u30fc\u30c9\u306e\u632f\u308b\u821e\u3044\u306b\u5909\u5316\u304c\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u30bb\u30fc\u30d5\u30c6\u30a3\u30fc\u30cd\u30c3\u30c8\u3068\u3057\u3066\u306e\u30c6\u30b9\u30c8\u3092\u884c\u3046\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u4ee5\u4e0b\u3082\u5408\u308f\u305b\u3066\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/pleiades.io\/help\/idea\/refactoring-source-code.html#1078e\" target=\"_blank\" rel=\"noopener\">IntelliJ IDEA<br \/>\n\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/a><\/li>\n<li><a href=\"https:\/\/blog.jetbrains.com\/idea\/2019\/07\/refactoring-inline-method-in-intellij-idea\/\">\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0: IntelliJ<br \/>\nIDEA \u3067\u306e\u30a4\u30f3\u30e9\u30a4\u30f3\u30e1\u30bd\u30c3\u30c9<\/a>\uff08<a href=\"https:\/\/youtu.be\/uYsFlbXJbog\" target=\"_blank\" rel=\"noopener\">\u52d5\u753b<\/a>\u3092\u542b\u3080\uff09<\/li>\n<li><a href=\"https:\/\/blog.jetbrains.com\/idea\/2019\/04\/refactoring-extract-variable-in-intellij-idea\/\">\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0:<br \/>\nIntelliJ IDEA \u3067\u306e\u5909\u6570\u306e\u62bd\u51fa<\/a>\u304a\u3088\u3073<a href=\"https:\/\/youtu.be\/W_IiuORF16E\" target=\"_blank\" rel=\"noopener\">\u52d5\u753b<\/a><\/li>\n<\/ul>\n","protected":false},"author":811,"featured_media":67929,"comment_status":"closed","ping_status":"closed","template":"","categories":[1401],"tags":[],"cross-post-tag":[],"acf":[],"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/idea\/75981"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/idea"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/types\/idea"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/users\/811"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/comments?post=75981"}],"version-history":[{"count":4,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/idea\/75981\/revisions"}],"predecessor-version":[{"id":77395,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/idea\/75981\/revisions\/77395"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/media\/67929"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/media?parent=75981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/categories?post=75981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/tags?post=75981"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/ja\/wp-json\/wp\/v2\/cross-post-tag?post=75981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}