{"id":8164,"date":"2015-12-02T09:00:13","date_gmt":"2015-12-02T00:00:13","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=8164"},"modified":"2018-11-14T16:33:47","modified_gmt":"2018-11-14T07:33:47","slug":"lombok-de-spice-up-your-java","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2015\/12\/02\/lombok-de-spice-up-your-java\/","title":{"rendered":"Lombok \u3067 Spice up your Java!"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728\u3067\u3059\u3002<\/p>\n<p><a href=\"http:\/\/www.techscore.com\/blog\/2015\/11\/30\/techscore-advent-calendar-2015\/\">TECHSCORE Advent Calendar 2015<\/a> \u306e 2 \u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f <a href=\"https:\/\/projectlombok.org\/\">Lombok<\/a> \u3068\u3044\u3046 Java \u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u4e00\u3064\u3067\u5358\u7d14\u306a\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9\u3092\u81ea\u52d5\u751f\u6210\u3057\u3066\u304f\u308c\u308b\u306a\u3069\u3001\u4f55\u5ea6\u3082\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u300c\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u300d\u3092\u6e1b\u3089\u3057\u3066\u304f\u308c\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306e\u30bf\u30a4\u30c8\u30eb\u306b\u542b\u3093\u3067\u3044\u308b\u300cSpice up your Java\u300d\u306f Lombok \u306e\u30b5\u30a4\u30c8\u306b\u66f8\u304b\u308c\u3066\u3044\u305f\u3082\u306e\u3067\u3059\u3002\u305d\u306e\u8a00\u8449\u901a\u308a\u3001\u30d4\u30ea\u30ea\u3068\u3059\u308b\u30b9\u30d1\u30a4\u30b9\u3092\u3072\u3068\u632f\u308a\u3059\u308b\u3088\u3046\u306b\u3001\u666e\u901a\u306e Java \u30b3\u30fc\u30c9\u306b\u4e00\u5473\u6dfb\u3048\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u4ee5\u4e0b\u306e\u9806\u756a\u3067\u304a\u8a71\u3057\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><a href=\"#boilerplate-code\">\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9<\/a><\/li>\n<li><a href=\"#gekiteki-before-after\">\u4f7f\u7528\u4f8b: \u3053\u308c\u304c\u3001\u3053\u3046\u306a\u308b\uff01<\/a><\/li>\n<li><a href=\"#how-to-create-boilerplate-code-and-timing\">\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u306e\u4f5c\u308a\u65b9\u3068\u30bf\u30a4\u30df\u30f3\u30b0<\/a><\/li>\n<li><a href=\"#lombok-features\">Lombok \u306e\u6a5f\u80fd<\/a><\/li>\n<li><a href=\"#matome\">\u307e\u3068\u3081<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2 id=\"boilerplate-code\">\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9<\/h2>\n<p>\u5192\u982d\u3067\u300c\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u300d\u3068\u8a00\u3044\u307e\u3057\u305f\u304c\u3001\u82f1\u8a9e\u3067\u306f\u300c\u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\uff08Boilerplate Code\uff09\u300d\u3068\u547c\u3076\u305d\u3046\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u5358\u7d14\u306b\u5024\u306e\u53d6\u5f97\/\u8a2d\u5b9a\u3092\u884c\u3046\u3060\u3051\u306e\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9<\/li>\n<li>\u5f15\u6570\u7121\u3057\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001final \u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u5168\u3066\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/li>\n<li>toString() \u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u30b3\u30fc\u30c9<\/li>\n<li>equals(), hashCode() \u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u30b3\u30fc\u30c9<\/li>\n<li>\u7279\u5b9a\u306e\u4f8b\u5916\u3092 catch \u3057\u3066 RuntimeException \u3068\u3057\u3066\u6295\u3052\u76f4\u3059\u30b3\u30fc\u30c9<\/li>\n<li>\u4f8b\u5916\u3092\u6295\u3052\u308b\u3060\u3051\u306e private \u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff08java.lang.Math \u306e\u3088\u3046\u306b static \u30e1\u30bd\u30c3\u30c9\u3092\u96c6\u3081\u305f\u30af\u30e9\u30b9\u306e\u5834\u5408\uff09<\/li>\n<li>etc..<\/li>\n<\/ul>\n<p>\u3069\u308c\u3082\u5fc5\u8981\u3067\u306f\u3042\u308b\u3082\u306e\u306e\u3001\u6bce\u56de\u540c\u3058\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u3082\u591a\u304f\u3001\u6b63\u76f4\u306a\u3068\u3053\u308d\u9762\u5012\u3060\u3068\u611f\u3058\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<h2 id=\"gekiteki-before-after\">\u4f7f\u7528\u4f8b: \u3053\u308c\u304c\u3001\u3053\u3046\u306a\u308b\uff01<\/h2>\n<p>Lombok \u306e\u6a5f\u80fd\u306f\u3044\u304f\u3064\u3082\u3042\u308b\u306e\u3067\u3059\u304c\u3001\u307e\u305a\u306f\u4e00\u4f8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u3053\u308c\u304c\u3001<\/h3>\n<pre class=\"lang:java decode:true\">public class User {\r\n\r\n    private String name;\r\n\r\n    private String email;\r\n\r\n    public String getName() {\r\n        return name;\r\n    }\r\n\r\n    public void setName(String name) {\r\n        this.name = name;\r\n    }\r\n\r\n    public String getEmail() {\r\n        return email;\r\n    }\r\n\r\n    public void setEmail(String email) {\r\n        this.email = email;\r\n    }\r\n\r\n    @Override\r\n    public String toString() {\r\n        ...\r\n    }\r\n\r\n    @Override\r\n    public boolean equals(Object object) {\r\n        ...\r\n    }\r\n\r\n    @Override\r\n    public int hashCode() {\r\n        ...\r\n    }\r\n\r\n}<\/pre>\n<h3>\u3053\u3046\u306a\u308b\uff01<\/h3>\n<pre class=\"lang:java decode:true\">@Data\r\npublic class User {\r\n    private String name;\r\n    private String email;\r\n}\r\n<\/pre>\n<h3>\u306a\u3093\u3068\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u3002<\/h3>\n<p>\u5927\u91cf\u306e\u300c\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u300d\u304c @Data \u3068\u3044\u3046\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u4e00\u3064\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n<h2 id=\"how-to-create-boilerplate-code-and-timing\">\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u306e\u4f5c\u308a\u65b9\u3068\u30bf\u30a4\u30df\u30f3\u30b0<\/h2>\n<p>\u300cLombok \u3092\u4f7f\u3046\u3068\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u3066\u304f\u308c\u308b\u306e\u3067\u4fbf\u5229\u300d\u3068\u3044\u3046\u8da3\u65e8\u306e\u8a18\u4e8b\u3092\u66f8\u3044\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u304c\u3001\u3053\u3053\u3067\u300c\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u300d\u306e\u4f5c\u308a\u65b9\u3068\u30bf\u30a4\u30df\u30f3\u30b0\u306b\u3069\u306e\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308b\u306e\u304b\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002Lombok \u304c\u552f\u4e00\u306e\u9078\u629e\u80a2\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3068\u3001\u4ed6\u306e\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067 Lombok \u3092\u8a55\u4fa1\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3060\u3068\u601d\u3046\u304b\u3089\u3067\u3059\u3002<\/p>\n<h3>\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u306e\u4f5c\u308a\u65b9: \u81ea\u529b or \u81ea\u52d5\u751f\u6210<\/h3>\n<p>\u5927\u304d\u304f\u5206\u3051\u308b\u3068\u300c\u81ea\u5206\u3067\u66f8\u304f\u300d\u304b\u300c\u30c4\u30fc\u30eb\u7b49\u306b\u81ea\u52d5\u751f\u6210\u3057\u3066\u3082\u3089\u3046\u300d\u306e\u3069\u3061\u3089\u304b\u306b\u306a\u308a\u307e\u3059\u3002\u3044\u304f\u3064\u304b\u5177\u4f53\u4f8b\u3092\u6319\u3052\u3066\u307f\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u672c\u5f53\u306b\u81ea\u529b\u3067\u30bf\u30a4\u30d7\u3059\u308b<\/li>\n<li>\u30a8\u30c7\u30a3\u30bf\u306e\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u6a5f\u80fd\u3092\u4f7f\u3046<\/li>\n<li>IDE \u306e\u30b3\u30fc\u30c9\u751f\u6210\u6a5f\u80fd\u3092\u4f7f\u3046<\/li>\n<li>\u5c02\u7528\u306e\u30b3\u30fc\u30c9\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u3046<\/li>\n<li>Lombok \u3092\u4f7f\u3046<\/li>\n<li>etc..<\/li>\n<\/ul>\n<p>\u4ed6\u306b\u3082\u8272\u3005\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u6b21\u306f\u300c\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u300d\u304c\u4f5c\u3089\u308c\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u5206\u985e\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<h3>\u304a\u6c7a\u307e\u308a\u306e\u30b3\u30fc\u30c9\u3092\u4f5c\u308b\u30bf\u30a4\u30df\u30f3\u30b0: \u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6642 or \u30b3\u30f3\u30d1\u30a4\u30eb\u6642<\/h3>\n<p>\u30bf\u30a4\u30df\u30f3\u30b0\u306f\u5927\u304d\u304f\u5206\u3051\u308b\u3068\u300c\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6642\u300d\u304b\u300c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u300d\u306b\u306a\u308a\u307e\u3059\u3002\u5b9f\u884c\u6642\u306b\u751f\u6210\u3059\u308b\u3068\u3044\u3046\u9078\u629e\u80a2\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u3053\u3067\u306f\u8003\u3048\u306a\u3044\u3053\u3068\u306b\u3057\u307e\u3059\u3002\uff08\u5b9f\u884c\u6642\u306b\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u3089\u308c\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u70b9\u3067\u306f\u53c2\u7167\u3067\u304d\u306a\u3044\u305f\u3081\u3067\u3059\u3002\uff09<\/p>\n<p>\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6642\u306b\u30b3\u30fc\u30c9\u751f\u6210\u3059\u308b\u65b9\u6cd5\u306b\u306f\u3001IDE \u306e\u30b3\u30fc\u30c9\u751f\u6210\u6a5f\u80fd\u3092\u4f7f\u3046\u65b9\u6cd5\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002\u30e1\u30ea\u30c3\u30c8\u306f\u751f\u6210\u3055\u308c\u305f\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3057\u3084\u3059\u3044\u3068\u3053\u308d\u3067\u3059\u3002\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u5909\u66f4\u306b\u5f31\u3044\u3068\u3053\u308d\u3067\u3059\u3002\u4f8b\u3048\u3070\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u306e\u5909\u66f4\u306b\u4f34\u3044\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9\u3092\u518d\u751f\u6210\u3059\u308b\u5834\u5408\u3001\u65e2\u5b58\u306e\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9\u3092\u624b\u4f5c\u696d\u3067\u524a\u9664\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u30b3\u30fc\u30c9\u751f\u6210\u3059\u308b\u65b9\u6cd5\u306b\u306f\u3001\u4e00\u90e8\u306e\u30b3\u30fc\u30c9\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3084 Lombok \u00a0\u304c\u3042\u308a\u307e\u3059\u3002\u30e1\u30ea\u30c3\u30c8\u306f\u5909\u66f4\u306b\u3084\u3084\u5f37\u3044\u3068\u3053\u308d\u3067\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u3092\u5909\u66f4\u3059\u308c\u3070\u81ea\u52d5\u7684\u306b\u751f\u6210\u3055\u308c\u308b\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d\u3082\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u610f\u56f3\u3057\u306a\u3044\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u3066\u3044\u3066\u3082\u6c17\u4ed8\u304d\u306b\u304f\u3044\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n<p>\u3069\u3061\u3089\u304c\u512a\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u306a\u3044\u306e\u3067\u3001\u3084\u308a\u305f\u3044\u3053\u3068\u306b\u5408\u3063\u305f\u624b\u6bb5\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2 id=\"lombok-features\">Lombok \u306e\u6a5f\u80fd<\/h2>\n<p>\u305d\u308c\u3067\u306f Lombok \u306e\u6a5f\u80fd\u3092\u3044\u304f\u3064\u304b\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\uff08\u8a73\u7d30\u306f\u00a0<a href=\"https:\/\/projectlombok.org\/features\/index.html\">Lombok \u306e\u30b5\u30a4\u30c8<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\uff09<\/p>\n<p>&nbsp;<\/p>\n<h3>val (lombok.val)<\/h3>\n<p>val \u306f final \u306a\u5909\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>Before:<\/p>\n<pre class=\"lang:java decode:true\">\/\/ \u666e\u901a\u306e\u30b3\u30fc\u30c9\r\nfinal String message = \"hello\";<\/pre>\n<p>After:<\/p>\n<pre class=\"lang:java decode:true\">\/\/ Lombok \u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9\r\nval message = \"String\";<\/pre>\n<p>\u5909\u6570\u306e\u578b\u306f\u53f3\u8fba\u306e\u5024\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3082\u3046\u4e00\u5ea6\u8a00\u3044\u307e\u3059\u304c\u3001<span style=\"text-decoration: underline; color: #ff0000;\">\u5909\u6570\u306e\u578b\u306f\u53f3\u8fba\u306e\u5024\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3059<\/span>\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u6559\u79d1\u66f8\u306b\u300c\u5909\u6570\u306e\u578b\u306f ArrayList \u306e\u3088\u3046\u306a\u5177\u8c61\u30af\u30e9\u30b9\u3067\u306f\u306a\u304f\u3001List \u306e\u3088\u3046\u306a\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306b\u3057\u307e\u3057\u3087\u3046\u3002\u300d\u3068\u66f8\u304b\u308c\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u6559\u3048\u3092\u77e5\u3089\u306c\u9593\u306b\u7834\u3063\u3066\u3057\u307e\u308f\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"lang:java decode:true\">\/\/ Lombok \u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9\r\nval list = new ArrayList&lt;String&gt;();<\/pre>\n<p>\u3053\u308c\u306f\u6b21\u306e\u30b3\u30fc\u30c9\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true\">\/\/ \u3053\u3046\u306a\u308b\r\nfinal ArrayList&lt;String&gt; list = new ArrayList&lt;String&gt;();\r\n\r\n\/\/ \u3053\u3046\u306f\u306a\u3089\u306a\u3044\r\nfinal List&lt;String&gt; list = new ArrayList&lt;String&gt;();\r\n<\/pre>\n<p>\u3053\u306e\u5834\u5408\u306f\u3001(1) \u6c17\u306b\u3057\u306a\u3044\u3001(2) \u30ad\u30e3\u30b9\u30c8\u3059\u308b\u3001(3) val \u3092\u4f7f\u308f\u305a\u306b\u666e\u901a\u306b\u66f8\u304f\u3001\u306e\u3044\u305a\u308c\u304b\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:java decode:true\">\/\/ (1) \u6c17\u306b\u3057\u306a\u3044\r\nval list = new ArrayList&lt;String&gt;();\r\n\r\n\/\/ (2) \u30ad\u30e3\u30b9\u30c8\u3059\u308b\r\nval list = (List&lt;String&gt;) new ArrayList&lt;String&gt;();\r\n\r\n\/\/ (3) \u3082\u3057\u304f\u306f val \u3092\u4f7f\u308f\u305a\u306b\u666e\u901a\u306b\u66f8\u304f\r\nfinal List&lt;String&gt; list = new ArrayList&lt;&gt;();\r\n<\/pre>\n<p>\u3082\u3046\u4e00\u70b9\u6ce8\u610f\u3067\u3059\u304c\u3001Lombok 1.16.6 \u3067\u306f\u3001Lambda \u5f0f\u306e\u4e2d\u3067 val \u3092\u4f7f\u3063\u305f\u5834\u5408\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u7a00\u3067\u3059\u304c Lambda \u5f0f\u306e\u5916\u3067\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u3063\u305f\u3053\u3068\u3082\u3042\u308b\u306e\u3067\u3001\u82e5\u5e72\u5b89\u5b9a\u6027\u306b\u6b20\u3051\u3066\u3044\u307e\u3059\u3002\u300c\u305d\u308c\u3067\u306f val \u306f\u4f7f\u3044\u7269\u306b\u306a\u3089\u306a\u3044\u306e\u304b\uff1f\u300d\u3068\u554f\u308f\u308c\u308b\u3068\u3001\u300c\u305d\u3053\u307e\u3067\u60aa\u304f\u306f\u306a\u3044\u300d\u3068\u3044\u3046\u304b\u300c\u3046\u307e\u304f\u52d5\u304b\u306a\u3044\u30b1\u30fc\u30b9\u306f\u907f\u3051\u306a\u304c\u3089\u304a\u4ed8\u304d\u5408\u3044\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u308b\u300d\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3>@ToString (lombok.ToString)<br \/>\n@EqualsAndHashCode (lombok.EqualsAndHashCode)<\/h3>\n<p>@ToString \u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u542b\u3093\u3060\u6587\u5b57\u5217\u3092\u8fd4\u3059 toString() \u3092\u751f\u6210\u3057\u307e\u3059\u3002@EqualsAndHashCode \u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u7528\u3044\u3066\u6bd4\u8f03\u3092\u884c\u3046 equals() \u3068\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u304b\u3089\u751f\u6210\u3057\u305f\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u8fd4\u3059 hashCode() \u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<p>Before:<\/p>\n<pre class=\"lang:java decode:true\">\/\/ \u666e\u901a\u306e\u30b3\u30fc\u30c9\r\npublic class User {\r\n\r\n    private String name;\r\n    private String email;\r\n\r\n    @Override\r\n    public String toString() {\r\n        ...\r\n    }\r\n\r\n    @Override\r\n    public boolean equals(Object other) {\r\n        ...\r\n    }\r\n\r\n    @Override\r\n    public int hashCode() {\r\n        ...\r\n    }\r\n\r\n}<\/pre>\n<p>After:<\/p>\n<pre class=\"lang:java decode:true \">\/\/ Lombok \u3092\u4f7f\u3063\u305f\u30b3\u30fc\u30c9\r\n@ToString\r\n@EqualsAndHashCode\r\npublic class User {\r\n    private String name;\r\n    private String email;\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h3>@Value (lombok.Value)<br \/>\n@Data (lombok.Data)<\/h3>\n<p>@Value \u306f\u3044\u308f\u3086\u308b Immutable \u306a\u30af\u30e9\u30b9\uff08\u5024\u3092\u5909\u66f4\u3067\u304d\u306a\u3044\u30af\u30e9\u30b9\uff09\u3001@Data \u306f Mutable \u306a\u30af\u30e9\u30b9\uff08\u5024\u3092\u5909\u66f4\u3067\u304d\u308b\u30af\u30e9\u30b9\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f7f\u3044\u65b9\u306f\u30af\u30e9\u30b9\u306b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4ed8\u3051\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true \">@Data\r\npublic class User {\r\n    private String name;\r\n    private String email;\r\n}<\/pre>\n<p>\u4ee5\u4e0b\u306b @Value \u3068 @Data \u306e\u9055\u3044\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n<p>@Value \u304c\u4ed8\u3051\u3089\u308c\u305f\u30af\u30e9\u30b9:<\/p>\n<ul>\n<li>final \u306a\u30af\u30e9\u30b9\u306b\u306a\u308b\uff08\uff1d\u7d99\u627f\u3067\u304d\u306a\u3044\u30af\u30e9\u30b9\u306b\u306a\u308b\uff09<\/li>\n<li>Getter \u30e1\u30bd\u30c3\u30c9\u304c\u751f\u6210\u3055\u308c\u308b<\/li>\n<li>toString(), equals(), hashCode() \u304c\u751f\u6210\u3055\u308c\u308b<\/li>\n<li>\u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u304c final \u306b\u306a\u308b<\/li>\n<li>\u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u751f\u6210\u3055\u308c\u308b<\/li>\n<\/ul>\n<p>@Data \u304c\u4ed8\u3051\u3089\u308c\u305f\u30af\u30e9\u30b9<\/p>\n<ul>\n<li>Getter \u53ca\u3073 Setter \u30e1\u30bd\u30c3\u30c9\u304c\u751f\u6210\u3055\u308c\u308b<\/li>\n<li>toString(), equals(), hashCode() \u304c\u751f\u6210\u3055\u308c\u308b<\/li>\n<li>final \u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u751f\u6210\u3055\u308c\u308b<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>@Getter (lombok.Getter)<br \/>\n@Setter (lombok.Setter)<\/h3>\n<p>@Getter \u306f Getter \u30e1\u30bd\u30c3\u30c9\u3001@Setter \u306fSetter \u30e1\u30bd\u30c3\u30c9\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u30af\u30e9\u30b9\u307e\u305f\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30af\u30e9\u30b9\u306b\u4ed8\u3051\u305f\u5834\u5408\u306f\u5168\u3066\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u4ed8\u3051\u305f\u5834\u5408\u306f\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u307f\u304c\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3059\u3002\u30a2\u30af\u30bb\u30b9\u30ec\u30d9\u30eb\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f7f\u7528\u4f8b\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\u306b @Getter \u3092\u4ed8\u3051\u308b\u5834\u5408\uff09:<\/p>\n<pre class=\"lang:java decode:true\">\/\/ \u30d5\u30a3\u30fc\u30eb\u30c9\u306b @Getter \u3092\u4ed8\u3051\u308b\r\nclass User {\r\n    @Getter\r\n    private String name;\r\n    private String email;\r\n}<\/pre>\n<p>\u4f7f\u7528\u4f8b\uff08\u30af\u30e9\u30b9\u306b @Getter \u3092\u4ed8\u3051\u308b\u5834\u5408\uff09\uff1a<\/p>\n<pre class=\"lang:java decode:true\">\/\/ \u30af\u30e9\u30b9\u306b @Getter \u3092\u4ed8\u3051\u308b\r\n@Getter\r\nclass User {\r\n    private String name;\r\n    private String email;\r\n}\r\n<\/pre>\n<p>\u4f7f\u7528\u4f8b\uff08\u30a2\u30af\u30bb\u30b9\u30ec\u30d9\u30eb\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\uff09\uff1a<\/p>\n<pre class=\"lang:java decode:true\">\/\/ \u30a2\u30af\u30bb\u30b9\u30ec\u30d9\u30eb\u3092\u6307\u5b9a\u3059\u308b\r\nclass User {\r\n    @Getter(AccessLevel.PROTECTED)\r\n    private String name;\r\n    private String email;\r\n}\r\n<\/pre>\n<p>&nbsp;<\/p>\n<h3>@NoArgsConstructor (lombok.NoArgsConstructor)<br \/>\n@RequiredArgsConstructor (lombok.RequiredArgsConstructor)<br \/>\n@AllArgsConstructor (lombok.AllArgsConstructor)<\/h3>\n<p>\u3069\u308c\u3082\u30af\u30e9\u30b9\u306b\u6307\u5b9a\u3059\u308b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002@NoArgsConstructor \u306f\u5f15\u6570\u7121\u3057\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001@RequiredArgsConstructor \u306f final \u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001@AllArgsConstructor \u306f\u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f7f\u7528\u4f8b\uff1a<\/p>\n<pre class=\"lang:java decode:true \">\/\/ final \u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024 (name) \u3092\u53d7\u3051\u53d6\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u751f\u6210\u3059\u308b\r\n@RequiredArgsConstructor\r\nclass User {\r\n    private final String name;\r\n    private String email;\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h3>@NonNull (lombok.NonNull)<\/h3>\n<p>@NonNull \u306f null \u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u30b3\u30fc\u30c9\uff08\u5024\u304c null \u306a\u3089\u4f8b\u5916\u3092\u6295\u3052\u308b\u30b3\u30fc\u30c9\uff09\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true \">\/\/ \u5f15\u6570\u306e name \u304c null \u306a\u3089\u4f8b\u5916\u3092\u6295\u3052\u308b\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u308b\r\npublic void setName(@NonNull String name) {\r\n    ...\r\n}\r\n\r\n\/\/ \u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3068\u540c\u3058\r\npublic void setName(String name) {\r\n    if (name == null) {\r\n        throw new NullPointerException();\r\n    }\r\n    ...\r\n}<\/pre>\n<p>@NonNull \u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u5bfe\u3057\u3066\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u3001@Data \u3084 @Setter, @AllArgsConstructor \u306a\u3069\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002\u4ee5\u4e0b\u306f @Data \u3068 @AllArgsConstructor \u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u4f8b\u3067\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true\">@Data\r\n@AllArgsConstructor\r\nclass User {\r\n    @NonNull\r\n    private String name;\r\n}\r\n<\/pre>\n<p>@Data \u3068 @AllArgsConstructor \u306b\u3088\u3063\u3066\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3084 Setter \u30e1\u30bd\u30c3\u30c9\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306b @NonNull \u304c\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u751f\u6210\u3055\u308c\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3084 Setter \u30e1\u30bd\u30c3\u30c9\u306b null \u30c1\u30a7\u30c3\u30af\u306e\u30b3\u30fc\u30c9\u304c\u633f\u5165\u3055\u308c\u307e\u3059\u3002\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true\">class User {\r\n\r\n    private String name;\r\n\r\n\r\n    \/\/ @AllArgsConstructor \u306b\u3088\u3063\u3066\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u751f\u6210\u3055\u308c\u308b\r\n    public User(String name) {\r\n        \/\/ @NonNull \u306b\u3088\u3063\u3066 null \u30c1\u30a7\u30c3\u30af\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u308b\r\n        if (name == null) {\r\n            throw new NullPointerException();\r\n        }\r\n        this.name = name;\r\n    }\r\n\r\n    \/\/ @Data \u306b\u3088\u3063\u3066 Setter \u30e1\u30bd\u30c3\u30c9\u304c\u751f\u6210\u3055\u308c\u308b\r\n    public void setName(String name) {\r\n        \/\/ @NonNull \u306b\u3088\u3063\u3066 null \u30c1\u30a7\u30c3\u30af\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u308b\r\n        if (name == null) {\r\n            throw new NullPointerException();\r\n        }\r\n        this.name = name;\r\n    }\r\n\r\n    ....\r\n\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h3>@Cleanup (lombok.Cleanup)<\/h3>\n<p>@Cleanup \u306f close() \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true \">@Cleanup val reader = new FileReader(\"a.txt\");<\/pre>\n<p>Java7 \u4ee5\u4e0a\u306e\u5834\u5408\u306f try-with-resources \u6587\u3067\u3082\u540c\u7b49\u306e\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3001\u3069\u3061\u3089\u3092\u4f7f\u3063\u3066\u3082\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"lang:java decode:true \">try (val reader = new FileReader(\"a.txt\")) {\r\n    ...\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h3>@SneakyThrows (lombok.SneakyThrows)<\/h3>\n<p>@SneakyThrows \u3092\u4f7f\u3046\u3068\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3092\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3067\u3042\u308b\u304b\u306e\u3088\u3046\u306b\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u30fb\u30fb\u30fb\u8a00\u8449\u3060\u3051\u306e\u8aac\u660e\u3060\u3068\u4f1d\u308f\u308a\u306b\u304f\u3044\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u307e\u305a\u306f\u00a0@SneakyThrows \u3092\u7528\u3044\u305f\u30b3\u30fc\u30c9\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"lang:java decode:true\">@SneakyThrows(InterruptedException.class)\r\npublic static void sleepOneSecond() {\r\n    Thread.sleep(1000);\r\n}<\/pre>\n<p>Thread.sleep() \u306f\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3067\u3042\u308b InterruptedException \u3092\u6295\u3052\u308b\u306e\u3067\u3001\u666e\u901a\u3060\u3068 try-catch \u3067\u56f2\u3080\u304b\u3001Thread.sleep() \u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u306e throws \u306b InterruptedException \u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001@SneakyThrows \u3092\u4f7f\u3046\u3068\u4e0a\u8a18\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f InterruptedException \u306f\u3069\u3053\u3078\u884c\u3063\u3066\u3057\u307e\u3046\u306e\u304b\u3068\u3044\u3046\u3068\u3001\u3069\u3053\u304b\u3078\u6d88\u3048\u3066\u7121\u304f\u306a\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002Thread.sleep() \u306e\u4e2d\u3067 InterruptedException \u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u305d\u306e\u307e\u307e sleepOneSecond() \u30e1\u30bd\u30c3\u30c9\u306e\u4e0a\u4f4d\u968e\u5c64\u306b\u4f1d\u3048\u3089\u308c\u3066\u3044\u304d\u307e\u3059\u3002\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u306e\u3088\u3046\u306b\u6271\u308f\u308c\u308b\u3068\u3044\u3046\u3060\u3051\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u300c\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u306e\u3088\u3046\u306b\u300d\u306e\u90e8\u5206\u306b\u9b54\u6cd5\u3058\u307f\u305f\u3082\u306e\u3092\u611f\u3058\u308b\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u305d\u306e\u90e8\u5206\u3092\u6df1\u6398\u308a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u3001\u4e0a\u8a18\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u30b3\u30fc\u30c9\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true \">public static void sleepOneSecond() {\r\n    try {\r\n        Thread.sleep(1000);\r\n    } catch(InterruptedException exception) {\r\n        Lombok.sneakyThrows(exception);\r\n    }\r\n}<\/pre>\n<p>\u5358\u7d14\u306b try-catch \u3067\u56f2\u307e\u308c\u3001Lombok.sneakyThrows() \u306b catch \u3057\u305f\u4f8b\u5916\u3092\u6e21\u3057\u3066\u3044\u307e\u3059\u3002\u3059\u308b\u3068\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u304c\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u306e\u3088\u3046\u306b\u751f\u307e\u308c\u5909\u308f\u3063\u3066 throw \u3055\u308c\u308b\u30fb\u30fb\u3002\u305d\u306e\u79d8\u5bc6\u306f Lombok.sneakyThrows() \u306b\u3042\u308b\u3088\u3046\u3067\u3059\u3002\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u3092\u898b\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"lang:java decode:true\">public static RuntimeException sneakyThrow(Throwable t) {\r\n    if (t == null) throw new NullPointerException(\"t\");\r\n    Lombok.&lt;RuntimeException&gt;sneakyThrow0(t);\r\n    return null;\r\n}\r\n\r\n@SuppressWarnings(\"unchecked\")\r\nprivate static &lt;T extends Throwable&gt; void sneakyThrow0(Throwable t) throws T { \r\n    throw (T)t;\r\n}<\/pre>\n<p>\u4f8b\u5916\u306f sneakyThrows() \u304b\u3089 sneakyThrows0() \u306b\u6e21\u3055\u308c\u3001\u305d\u306e\u4e2d\u3067 throw \u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3057\u305f\u3002<\/p>\n<p>\u8abf\u3079\u3066\u307f\u305f\u3068\u3053\u308d\u3001\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3068\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u306e\u533a\u5225\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u3060\u3051\u306e\u3082\u306e\u3067\u3042\u308a\u3001JVM \u30ec\u30a4\u30e4\u30fc\uff08\u5b9f\u884c\u6642\uff09\u3067\u306f\u533a\u5225\u3055\u308c\u306a\u3044\u3088\u3046\u3067\u3059\u3002JVM \u30ec\u30a4\u30e4\u30fc\u3067\u533a\u5225\u3055\u308c\u306a\u3044\u3068\u3044\u3046\u306e\u306f\u3001\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3060\u308d\u3046\u3068\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3060\u308d\u3046\u3068 JVM \u304b\u3089\u3059\u308c\u3070\u300c\u4f8b\u5916\u3092\u6295\u3052\u308b\u300d\u3068\u3044\u3046\u540c\u3058\u51e6\u7406\u3060\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u305d\u308c\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30c1\u30a7\u30c3\u30af\u3055\u3048\u3059\u308a\u629c\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308c\u3070\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3092\u975e\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u306e\u3088\u3046\u306b throw \u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u305d\u3057\u3066\u3001Generics \u3092\u4f7f\u3046\u3053\u3068\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308a\u629c\u3051\u308b\u3001\u3068\u3044\u3046\u4ed5\u639b\u3051\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3>@Log (lombok.extern.java.log.Log)<br \/>\n@Log4j (lombok.extern.log4j.Log4j)<br \/>\n@Log4j2 (lombok.extern.log4j.Log4j2)<br \/>\n@Slf4j (lombok.extern.slf4j.Slf4j)<br \/>\n@XSlf4j (lombok.extern.slf4j.Xslf4j)<br \/>\n@CommonsLog (lombok.extern.apachecommons.CommonsLog)<\/h3>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u30ed\u30b0\u51fa\u529b\u3092\u3059\u308b\u3068\u304d\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a private static final \u306a Logger \u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306f\u826f\u304f\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true\">import java.util.logging.Logger;\r\n\r\npublic class Main {\r\n\r\n    private static final Logger log = Logger.getLogger(Main.class.getName());\r\n\r\n    public static void main(String[] args) {\r\n        log.info(\"Hello\");\r\n    }\r\n\r\n}<\/pre>\n<p>@Log \u3092\u4f7f\u3046\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e0a\u8a18\u306e\u300cprivate static final \u306a Logger \u3092\u5b9a\u7fa9\u3059\u308b\u300d\u3068\u3044\u3046\u90e8\u5206\u3092\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:java decode:true \">import lombok.extern.java.Log;\r\n\r\n@Log\r\npublic class Main {\r\n\r\n    public static void main(String[] args) {\r\n        log.info(\"Hello\");\r\n    }\r\n\r\n}<\/pre>\n<p>@Log \u4ee5\u5916\u306b\u3082 @Log4j \u3084 @Slf4j \u306a\u3069\u3001\u5404\u7a2e Logger \u306b\u5bfe\u5fdc\u3057\u305f\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2 id=\"matome\">\u307e\u3068\u3081<\/h2>\n<p>\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\u3002Java \u3092\u4f7f\u3063\u3066\u3044\u308b\u3068\u300c\u624b\u8efd\u306b\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u3067\u304d\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e\u3063\u3066\u697d\u3060\u306a\u30fc\u300d\u3068\u601d\u3046\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u304c\u3001Lombok \u3092\u4f7f\u3048\u3070\u305d\u308c\u3068\u4f3c\u305f\u3088\u3046\u306a\u3053\u3068\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Lombok \u304c\u63d0\u4f9b\u3059\u308b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u3044\u304f\u3064\u3082\u7d39\u4ecb\u3057\u307e\u3057\u305f\u304c\u3001\u4e2d\u306b\u306f\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3067\u52d5\u4f5c\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u30a2\u30af\u30bb\u30c3\u30b5\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d\u306b get\/set \u3092\u4ed8\u3051\u308b\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u5b9f\u9a13\u7684\u306a\u6a5f\u80fd\uff08\u307e\u3060\u6b63\u5f0f\u7248\u3067\u306f\u306a\u3044\u6a5f\u80fd\uff09\u306e\u4e2d\u306b\u3082\u9762\u767d\u305d\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u662f\u975e\u3068\u3082 Lombok \u3092\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728\u3067\u3059\u3002<\/p>\n<p>TECHSCORE Advent Calendar 2015 \u306e 2 \u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f Lombok \u3068\u3044\u3046 Java \u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/><a href=\"https:\/\/www.techscore.com\/blog\/2015\/12\/02\/lombok-de-spice-up-your-java\/\">\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[215,18],"tags":[141,57],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/8164"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=8164"}],"version-history":[{"count":82,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/8164\/revisions"}],"predecessor-version":[{"id":8522,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/8164\/revisions\/8522"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=8164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=8164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=8164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}