{"id":565,"date":"2018-06-03T15:22:03","date_gmt":"2018-06-03T06:22:03","guid":{"rendered":"https:\/\/ito-u-oti.com\/?p=565"},"modified":"2018-06-04T22:41:11","modified_gmt":"2018-06-04T13:41:11","slug":"post-565","status":"publish","type":"post","link":"https:\/\/ito-u-oti.com\/?p=565","title":{"rendered":"oracle Java SE 8 Programmer\u2161\uff08Gold\uff09\u306b\u5408\u683c\u3057\u305f\u52c9\u5f37\u65b9\u6cd5\u3068\u8a66\u9a13\u3067\u6ce8\u610f\u3057\u305f\u30dd\u30a4\u30f3\u30c8"},"content":{"rendered":"

oracle Java SE 8 Programmer\u2161\uff08Gold\uff09\u306b\u5408\u683c\u3057\u305f\u52c9\u5f37\u65b9\u6cd5\u3068\u8a66\u9a13\u3067\u6ce8\u610f\u3057\u305f\u30dd\u30a4\u30f3\u30c8<\/h2>\n

oracle Java SE \u306eGold\u3092\u53d7\u9a13\u3057\u3066\u5408\u683c\u3057\u307e\u3057\u305f\u3002
\n\u4ed6\u306e\u3088\u304f\u3042\u308b\u30d6\u30ed\u30b0\u307f\u305f\u3044\u306b\u300c\u4e00\u767a\u5408\u683c\u3057\u307e\u3057\u305f\uff01\uff01\uff01\u300d\u3068\u304b\u3067\u306f\u306a\u3044\u3067\u3059\uff08\u7b11\uff09
\n1\u56de\u76ee\u4e0d\u5408\u683c\u30672\u56de\u76ee\u306b\u5408\u683c\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u52c9\u5f37\u6642\u9593\uff1a\uff11\u30f6\u6708\u534a\u304f\u3089\u3044\u3067\u5e73\u65e52\u6642\u9593\u3001\u4f11\u65e54\u6642\u9593\u304f\u3089\u3044
\n1\u56de\u76ee\uff1a\u4e0d\u5408\u683c\u3000\u5408\u683c\u30e9\u30a4\u30f365%\u306b\u5bfe\u3057\u3066\u6b63\u89e3\u738757%
\n2\u56de\u76ee\uff1a\u5408\u683c\u3000\u3000\u5408\u683c\u30e9\u30a4\u30f392%\u306b\u5bfe\u3057\u3066\u6b63\u89e3\u738792%<\/p>\n

1\u56de\u76ee\u30682\u56de\u76ee\u306e\u9593\u306f2\u9031\u9593\u3067\u3057\u305f\u3002
\noracle\u3067\u518d\u53d7\u9a13\u7121\u6599\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u671f\u9593\u4e2d\u3060\u3063\u305f\u306e\u3067\u30012\u56de\u76ee\u306f\u7121\u6599\u3067\u53d7\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002
\n\u518d\u53d7\u9a13\u7121\u6599\u3060\u3063\u305f\u308a\u3001\u53d7\u9a13\u6599\u306e\u5024\u4e0b\u3052\u3060\u3063\u305f\u308a\u3068\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u304c\u3042\u308b\u306e\u3067\u305d\u306e\u6642\u306b\u53d7\u3051\u308b\u3068\u304a\u5f97\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n

\u52c9\u5f37\u65b9\u6cd5\u30681\u56de\u76ee\u30682\u56de\u76ee\u3067\u3064\u307e\u3065\u3044\u305f\u30dd\u30a4\u30f3\u30c8\u3092\u8f09\u305b\u307e\u3059\u3002<\/p>\n

\u52c9\u5f37\u65b9\u6cd5\uff1a\u53d7\u9a131\u56de\u76ee\u307e\u3067<\/h3>\n

\u3044\u308f\u3086\u308b\u9ed2\u672c\u3067\u52c9\u5f37\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3057\u304b\u4f7f\u3063\u3066\u307e\u305b\u3093\u3002
\n\"\"

\r\n<\/a>\r\n<\/div>\r\n<\/p>\n

1\u65e5\u306b\u3001
\n1\u7ae0\u5206\u306e\u7406\u89e3
\n\u524d1\u7ae0\u5206\u306e\u5fa9\u7fd2
\n\u524d\u30051\u7ae0\u5206\u306e\u89e3\u304d\u306a\u304a\u3057
\n\u3068\u3044\u3046\u611f\u3058\u3067\u3084\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u307e\u305a\u554f\u984c\u306b\u53d6\u308a\u7d44\u3093\u3067\u307f\u3066\u3001\u305d\u306e\u5f8c\u89e3\u7b54\u30da\u30fc\u30b8\u3067\u78ba\u8a8d\u3057\u3066\u3044\u304f\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u3002
\n\u3084\u3063\u3071\u308a\u6700\u521d\u306f\u7b54\u3048\u5408\u308f\u305b\u3059\u308b\u3068\u30dc\u30ed\u30dc\u30ed\u306a\u306e\u3067\u3059\u3051\u308c\u3069\u3001
\n\u6b21\u306e\u65e5\u306b\u3082\u3046\u4e00\u5ea6\u540c\u3058\u5834\u6240\u3092\u89e3\u3044\u3066\u4e0d\u6b63\u89e3\u306e\u89e3\u7b54\u89e3\u8aac\u3092\u78ba\u8a8d\u3001
\n\u307e\u305f\u305d\u306e\u6b21\u306e\u65e5\u306b\u540c\u3058\u5834\u6240\u3092\u89e3\u304f\u3002
\n\u3068\u3044\u3046\u611f\u3058\u30673\u65e5\u304b\u3051\u3066\u540c\u3058\u5834\u6240\u3092\u89e3\u304f\u3068\u3055\u3059\u304c\u306b\u5206\u304b\u308a\u307e\u3059\u3002\uff08\u7b54\u3048\u306e\u9806\u756a\u3059\u3089\u899a\u3048\u3066\u304f\u308b\uff09
\n\u305d\u308c\u30922\u9031\u9593\u304f\u3089\u3044\u304b\u3051\u306610\u7ae0\u307e\u3067\u3084\u3063\u3066\u307e\u3057\u305f\u3002\uff08\u6bce\u65e5\u3058\u3083\u306a\u304f\u3066\u30b5\u30dc\u3063\u305f\u308a\u3082\u3057\u3066\u307e\u3057\u305f\u30fb\u30fb\u30fb\uff08\u3000\uff3e\u03c9\uff3e\uff09\uff09<\/p>\n

\u6b8b\u308a\u306e1\u9031\u9593\u3067\u3084\u3063\u305f\u3053\u3068\u306f\u30fb\u30fb\u30fb
\n11\u7ae0\u306e\u7dcf\u4ed5\u4e0a\u3052\u554f\u984c\u3092\u3084\u308a\u307e\u3057\u305f\u300285\u554f1\u65e5\u3067\u89e3\u304f\u306e\u306f\u3057\u3093\u3069\u304b\u3063\u305f\u306e\u30671\u65e540\u554f\u307b\u3069\u306b\u5206\u5272\u3057\u3066\u30fb\u30fb\u30fb
\nWeb\u3067\u9ed2\u672c\u306e\u7dcf\u4ed5\u4e0a\u3052\u554f\u984c\u304c\u3082\u3046\u4e00\u3064\u914d\u5e03\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u308c\u3082DL\u3057\u3066\u89e3\u304d\u307e\u3057\u305f\u3002\u3053\u3061\u3089\u306e\u65b9\u304c\u96e3\u3057\u3044\u5370\u8c61\u3002
\nhttps:\/\/book.impress.co.jp\/books\/1116101039<\/a>
\n\u4e0b\u306b\u30b9\u30af\u30ed\u30fc\u30eb\u3057\u3066\u3044\u304f\u3068\u300c\u7279\u5178\u300d\u3068\u3044\u3046\u9805\u76ee\u304c\u3042\u308b\u306e\u3067\u305d\u3053\u304b\u3089DL\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u305d\u3057\u3066\u6e80\u3092\u6301\u3057\u3066\u53d7\u9a13\u30fb\u30fb\u30fb\uff01\u7121\u4e8b\u4e0d\u5408\u683c\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n

\u52c9\u5f37\u65b9\u6cd5\uff1a\u53d7\u9a132\u56de\u76ee\u307e\u3067<\/h3>\n

\u8a18\u61b6\u304c\u3042\u308b\u9593\u304c\u3044\u3044\uff01\uff01\u3068\u3044\u3046\u3053\u3068\u3067\u518d\u53d7\u9a13\u7121\u6599\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3067\u518d\u53d7\u9a13\u3067\u304d\u308b\u6700\u901f\u306e2\u9031\u9593\u5f8c\u306b\u53d7\u9a13\u3092\u4e88\u7d04\u3057\u307e\u3057\u305f\u3002
\n\u6700\u521d\u306e1\u9031\u9593\u306f\u9ed2\u672c\u306e10\u7ae0\u307e\u3067\u306e\u89e3\u304d\u306a\u304a\u3057\u30021\u56de\u76ee\u306e\u3084\u308a\u65b9\u3068\u540c\u3058\u3067\u3059\u3002
\n\u6b21\u306e1\u9031\u9593\u3067\u7dcf\u4ed5\u4e0a\u3052\u554f\u984c2\u672c\u5206\u306e\u89e3\u304d\u306a\u304a\u3057\uff0boracle\u3067\u30b5\u30f3\u30d7\u30eb\u554f\u984c\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u305f\u306e\u3067\u305d\u308c\u3082\u89e3\u304d\u307e\u3057\u305f\u3002\uff08\u3082\u3063\u3068\u65e9\u304f\u6c17\u3065\u3051\u3066\u304a\u3051\u3070\u30fb\u30fb\u30fb\uff09
\nhttp:\/\/www.oracle.com\/jp\/education\/certification\/java-campaign-3254824-ja.html<\/a><\/p>\n

\u3042\u3068\u306fJavaDoc\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u773a\u3081\u3066\u3044\u307e\u3057\u305f\u3002\u7279\u306b\u623b\u308a\u5024\u3068\u30e1\u30bd\u30c3\u30c9\u306e\u5185\u5bb9\u3092\u6ce8\u8996\u3057\u3064\u3064\u3002
\n\u4f8b\u3048\u3070Stream<T><\/a>\u3068IntStream<\/a>\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u9055\u3044\u3068\u304b\u3001Optional<\/a>\u306e\u5185\u5bb9\u3068\u304b
\n\u3068\u306b\u304b\u304f\u300c\u3042\u308c\uff1f\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u4f55\u3060\u3063\u3051\u30fb\u30fb\uff1f\u300d\u3068\u3044\u3046\u611f\u3058\u306e\u3082\u306e\u304c\u3042\u3063\u305f\u3089\u3059\u3050\u306bJavaDoc\u3092\u898b\u3066\u78ba\u8a8d\u3057\u3066\u307e\u3057\u305f\u3002<\/p>\n

\u305d\u3057\u3066\u8a66\u9a13\u5f53\u65e5\u3001\u7121\u4e8b\u5408\u683c\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3057\u305f\u3002
\n2\u56de\u76ee\u306a\u3089\u305d\u308a\u3083\u5f53\u305f\u308a\u524d\u3060\u308d\uff5e\uff01\u3068\u601d\u3046\u304b\u3082\u3057\u308c\u306a\u3044\u3067\u3059\u3051\u308c\u3069\u3001
\n1\u56de\u76ee\u3067\u3069\u3053\u304c\u3044\u3051\u306a\u304b\u3063\u305f\u306e\u304b\u3068\u3044\u3046\u3053\u3068\u3084\u4e0d\u8db3\u3057\u3066\u3044\u305f\u70b9\u306a\u3069\u3092\u5206\u6790\u3057\u30662\u56de\u76ee\u307e\u3067\u306b\u7167\u6e96\u3092\u5408\u308f\u305b\u3066\u8ecc\u9053\u3092\u4fee\u6b63\u3057\u3066\u3044\u304f\u3068\u3044\u3046\u306e\u306f\u4e2d\u3005\u5927\u4e8b\u306a\u3053\u3068\u3067\u30012\u56de\u76ee\u3067\u3057\u3063\u304b\u308a\u76ee\u6a19\u306e\u9054\u6210\u307e\u3067\u6301\u3063\u3066\u3044\u3051\u308b\u3068\u3044\u3046\u306e\u306f\u3068\u3066\u3082\u91cd\u8981\u306a\u4e8b\u3060\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002\uff08\u81ea\u753b\u81ea\u8cdb\uff09<\/p>\n

\u3064\u307e\u3065\u3044\u305f\u30dd\u30a4\u30f3\u30c8<\/h3>\n

\u9ed2\u672c\u3067\u30ab\u30d0\u30fc\u3057\u304d\u308c\u306a\u3044\u90e8\u5206\u3068\u304b\u3002
\n\u88cf\u3092\u8fd4\u305b\u3070\u3053\u3044\u3064\u3089\u306f\u8a66\u9a13\u3067\u9ad8\u78ba\u7387\u3067\u51fa\u984c\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3002\u5fc3\u3057\u3066\u898b\u308b\u3079\u3057\u3002<\/p>\n

Deque<\/h4>\n

https:\/\/docs.oracle.com\/javase\/jp\/8\/docs\/api\/java\/util\/Deque.html<\/a>
\nDeque\u306fQueue\u3068Stack\u306e\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u307f\u305f\u3044\u306a\u5b58\u5728\u3002\u6545\u306b\u7406\u89e3\u304c\u9762\u5012\u3002
\n\u7279\u306bQueue\u3068Stack\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3069\u3061\u3089\u3082\u4f7f\u3048\u308b\u305f\u3081\u3001\u3053\u306e\u4e8c\u3064\u306e\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u308f\u308c\u305f\u5834\u5408\u3001\u5148\u982d\u3068\u672b\u5c3e\u3069\u3061\u3089\u306b\u5bfe\u3057\u3066\u306e\u52d5\u4f5c\u3060\u3088\uff01\u3068\u3044\u3046\u611f\u3058\u3067\u6df7\u4e71\u3057\u3066\u304f\u308b\u3002
\n\u4ee5\u4e0b\u306e\u4e8b\u3092\u7406\u89e3\u3057\u3066\u3044\u308c\u3070\u5927\u4e08\u592b\u3002
\nQueue<\/span>
\nadd(e)\u30fb\u30fb\u30fbDeque\u3067\u8a00\u3046addLast(e)
\nremove()\u30fb\u30fb\u30fbDeque\u3067\u8a00\u3046removeFirst()<\/p>\n

Stack<\/span>
\npush(e)\u30fb\u30fb\u30fbDeque\u3067\u8a00\u3046addFirst(e)
\npop()\u30fb\u30fb\u30fbDeque\u3067\u8a00\u3046removeFirst()<\/p>\n

\u8d85\u660e\u5feb\u306a\u56f3\u3067\u7406\u89e3\u3057\u305f\u3002\u3053\u306e\u6642\u81ea\u5206\u306f\u5929\u624d\u304b\u3068\u601d\u3063\u305f\u3002\uff08\u591a\u5206N\u756a\u714e\u3058\uff09
\n\u307e\u305aQueue\u3068Stack\u306e\u57fa\u672c\u30a4\u30e1\u30fc\u30b8
\n\"\"<\/p>\n

\u304b\u3089\u306eQueue\u3092\u53cd\u8ee2\u3057\u3066\u8db3\u3059\u3068\u30fb\u30fb\u30fb
\n\"\"<\/p>\n

Deque\uff08\u4e21\u7aef\u30ad\u30e5\u30fc\uff09\u306e\u5b8c\u6210
\n\"\"<\/p>\n

Outer\u30fbInner\u30af\u30e9\u30b9<\/h4>\n

Outer.Inner inner = new Outer. new Inner();
\n\u3068\u3044\u3046\u554f\u984c\u7cfb\u3002static\u304c\u5165\u3063\u3066\u304f\u308b\u3068\u4f59\u8a08\u306b\u3084\u3084\u3053\u3057\u304f\u306a\u3063\u3066\u304f\u308b\u3002<\/p>\n

\u5b9f\u969b\u306b\u30bd\u30fc\u30b9\u66f8\u3044\u3066\u78ba\u8a8d\u3057\u3066\u307f\u305f\u3002<\/p>\n

\r\npackage class_makeDiff;\r\n\r\npublic class ClassMakeDiff {\r\n\r\n    public static void main(String[] args) {\r\n\r\n        \/\/ A\r\n        ClassMakeDiff.A a = new ClassMakeDiff().new A();\r\n        System.out.println(a.str);\r\n\r\n        \/\/ B\r\n        ClassMakeDiff.B b = new ClassMakeDiff.B();\r\n        System.out.println(b.str);\r\n\r\n        \/\/ C\r\n        \/\/\u5b9f\u8cea C.new C2()\r\n        ClassMakeDiff.C.C2 c = new ClassMakeDiff.C().new C2();\r\n        System.out.println(c.str);\r\n\r\n        \/\/ D\r\n        \/\/\u5b9f\u8cea D.D2\r\n        ClassMakeDiff.D.D2 d = new ClassMakeDiff.D.D2();\r\n        System.out.println(d.str);\r\n    }\r\n\r\n    \/**\r\n     * Outer...public class<\/br>\r\n     * Inner...public class\r\n     *\/\r\n    public class A {\r\n        String str = "nonStatic_nonStatic";\r\n    }\r\n\r\n    \/**\r\n     * Outer...public class<\/br>\r\n     * Inner...public static class\r\n     *\/\r\n    public static class B {\r\n        String str = "nonStatic_static";\r\n    }\r\n\r\n    \/**\r\n     * Outer...public static class<\/br>\r\n     * Inner...public class\r\n     *\/\r\n    public static class C {\r\n        public class C2 {\r\n            String str = "staic_nonStatic";\r\n        }\r\n    }\r\n\r\n    \/**\r\n     * Outer...public static class<\/br>\r\n     * Inner...public static class\r\n     *\/\r\n    public static class D {\r\n        public static class D2 {\r\n            String str = "static_static";\r\n        }\r\n    }\r\n}\r\n<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
\r\nnonStatic_nonStatic\r\nnonStatic_static\r\nstaic_nonStatic\r\nstatic_static\r\n<\/pre>\n
Optional<\/h4>\n
\u9ed2\u672c\u3067\u306fOptional\u306b\u3064\u3044\u3066\u306e\u8aac\u660e\u306f\u5fae\u3005\u305f\u308b\u3082\u306e\u3057\u304b\u66f8\u3044\u3066\u3044\u306a\u3044\u3002\u3082\u306f\u3084\u8a18\u8f09\u3057\u3066\u3044\u306a\u3044\u306b\u7b49\u3057\u3044\u3002
\n\u3051\u3069\u8a66\u9a13\u3060\u3068\u7d50\u69cb\u3067\u308b\u3002
\nJavaDoc\u3092\u898b\u308b\u306e\u304c\u4e00\u756a\u3044\u3044\u3002
\nhttps:\/\/docs.oracle.com\/javase\/jp\/8\/docs\/api\/java\/util\/Optional.html<\/a>
\n\u7279\u306b
\n
\nof(T value)
\nofNullable(T value)
\norElse(T other)
\norElseGet(Supplier<? extends T> other)
\nifPresent(Consumer<? super T> consumer)
\n<\/strong>
\n\u306f\u623b\u308a\u5024\u3082\u542b\u3081\u3066\u899a\u3048\u305f\u65b9\u304c\u3044\u3044\u3002\u5b8c\u5168\u306b\u6697\u8a18\u3082\u306e\u3002<\/p>\n
Optional\u578b\u306fget()\u3092\u4f7f\u308f\u306a\u3044\u3068\u4e2d\u306e\u5024\u304c\u53d6\u308c\u306a\u3044\u3068\u3044\u3046\u306e\u3082\u6ce8\u610f\u3002
\nIntStream\u578b\u3067\u8a08\u7b97\u3057\u305f\u3042\u3068\u305f\u3060int\u306b\u683c\u7d0d\u3059\u308b\u3068\u304b\u3067\u3088\u304f\u5f15\u3063\u304b\u304b\u308b\u3002
\nget()\u3092\u4f7f\u308f\u306a\u3044\u3068int\u578b\u306b\u683c\u7d0d\u3067\u304d\u306a\u3044\u3068\u304b\u3002<\/p>\n
\u590f\u6642\u9593<\/h4>\n
\u9ed2\u672c\u3067\u306f\u4e00\u5207\u8aac\u660e\u3055\u308c\u306a\u3044\u5185\u5bb9\u3002\u3051\u3069\u8a66\u9a13\u3067\u306f\u51fa\u308b\u3002
\n\u590f\u6642\u9593\uff08\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\uff09\u3068\u306f\u3001\u7279\u5b9a\u306e\u671f\u9593\u3060\u3051 UTC \u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u304c1\u6642\u9593\u591a\u304f\u306a\u308b\u3053\u3068\u3002
\n\u592a\u967d\u306e\u51fa\u3066\u3044\u308b\u6642\u9593\u306b\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8272\u3005\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u3089\u3057\u3044\u3002
\n\u30b5\u30de\u30fc\u30bf\u30a4\u30e0\u3068\u306f<\/a><\/p>\n
\u8868\u793a\u4e0a1\u6642\u9593\u306e\u305a\u308c\u304c\u767a\u751f\u3059\u308b\u3060\u3051\u3067\u3001\u73fe\u5b9f\u6642\u9593\u306f\u5909\u308f\u3089\u306a\u3044\u3002<\/strong>
\n\u306e\u3067\u3001\u6642\u9593\u306e\u9577\u3055\u306e\u8a08\u7b97\u306f\u73fe\u5b9f\u6642\u9593\u306e\u307e\u307e\uff081\u6642\u9593\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3068\u304b\u3057\u306a\u3044\uff09
\n\u6642\u9593\u3092\u51fa\u529b\u3059\u308b\u6642\u3060\u3051\u590f\u6642\u9593\u306e\u8a08\u7b97\u304c\u5165\u308b\uff081\u6642\u9593\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\uff09
\n\"\"<\/p>\n
.reverse()<\/h4>\n
stream\u306e.sorted()\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3001Comparator.comparing\u306e\u4e26\u3073\u66ff\u3048\u30e1\u30bd\u30c3\u30c9\u306e\u3069\u3053\u306b.reversed()\u304c\u5165\u308b\u304b\u306b\u3088\u3063\u3066\u6607\u9806\u3068\u964d\u9806\u304c\u304b\u308f\u308b\u3002
\n\u9014\u4e2d\u306b\u5165\u308b\u3068\u305d\u308c\u307e\u3067\u304c\u9006\u306b\u3001\u6700\u5f8c\u306b\u5165\u308b\u3068\u5168\u3066\u304c\u9006\u306b\u306a\u308b\u3002<\/p>\n
\r\n\/\/A\u306eName\u6607\u9806\u3001Title\u6607\u9806\r\n.sorted(Comparator.comparing(A::getName).thenComparing(A::getTitle));\r\n\r\n\/\/A\u306eName\u964d\u9806\u3001Title\u6607\u9806\r\n.sorted(Comparator.comparing(A::getName).reversed().thenComparing(A::getTitle));\r\n\r\n\/\/A\u306eName\u6607\u9806\u3001Title\u964d\u9806\r\n.sorted(Comparator.comparing(A::getName).reversed().thenComparing(A::getTitle).reversed());\r\n\r\n\/\/A\u306eName\u964d\u9806\u3001Title\u964d\u9806\r\n.sorted(Comparator.comparing(A::getName).thenComparing(A::getTitle).reversed());\r\n<\/pre>\n
\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u623b\u308a\u5024<\/h4>\n
\u5f15\u3063\u639b\u3051\u554f\u984c\u3067\u304b\u306a\u308a\u51fa\u3066\u304f\u308b\u3002
\nStream<T>\u3067\u623b\u308a\u5024IntStream\u306e\u30e1\u30bd\u30c3\u30c9\u4f7f\u7528\u3057\u3066\u308b\u3068\u304b\u3001
\nInt\u578b\u306b\u623b\u308a\u5024IntStream\u578b\u683c\u7d0d\u3057\u3066\u308b\u3068\u304b\u30fb\u30fb\u30fb
\nJavaDoc\u898b\u308b\u3057\u304b\u306a\u3044\u3002<\/p>\n
ExecuterService\u3068ForkJoinPool<\/h4>\n
\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3068\u5bfe\u5fdc\u3059\u308b\u578b\u3092\u6df7\u540c\u3057\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f
\nExecuterService
\nexecute\u30fb\u30fb\u30fb\u623b\u308a\u5024\u7121\u3057\u306e\u975e\u540c\u671f\uff08Callable\u307e\u305f\u306fRunnable\uff09
\nsubmit\u30fb\u30fb\u30fb\u623b\u308a\u5024\u6709\u308a\u306e\u975e\u540c\u671f\uff08Callable\u307e\u305f\u306fRunnable\uff09<\/p>\n
ForkJoinPool
\nexecute\u30fb\u30fb\u30fb\u623b\u308a\u5024\u7121\u3057\u306e\u975e\u540c\u671f\uff08ForkJoinTask\u307e\u305f\u306fForkJoinAction\uff09
\ninvork\u30fb\u30fb\u30fb\u623b\u308a\u5024\u6709\u308a\u306e\u540c\u671f\uff08ForkJoinTask\u307e\u305f\u306fForkJoinAction\uff09
\nsubmit\u30fb\u30fb\u30fb\u623b\u308a\u5024\u6709\u308a\u306e\u975e\u540c\u671f\uff08ForkJoinTask\u307e\u305f\u306fForkJoinAction\uff09<\/p>\n
Compare<\/h4>\n
sort\u306e\u8a71\u3002
\ncompartor\u306ecompare(sortTarget o1, sortTarget o2)\u30e1\u30bd\u30c3\u30c9\u3067\u5185\u90e8\u51e6\u7406\u306b
\ncompareTo\u3092\u4f7f\u3063\u305f\u6642\u306b\u6607\u9806\u3068\u964d\u9806\u3069\u3063\u3061\u3060\u3063\u3051\uff1f\u3068\u3044\u3046\u306e\u3092\u5fd8\u308c\u308b\u306e\u306f\u3088\u304f\u3042\u308b\u8a71\u3002<\/p>\n
\u57fa\u672c\u306f
\no2-o1\u30fb\u30fb\u30fb\u964d\u9806
\no1-o2\u30fb\u30fb\u30fb\u6607\u9806
\n\u306e\u8003\u3048\u65b9\u3067OK<\/p>\n
\r\npackage sorted_compareTo;\r\n\r\nimport java.util.Arrays;\r\nimport java.util.Collections;\r\nimport java.util.Comparator;\r\nimport java.util.List;\r\n\r\npublic class compareTo {\r\n\r\n    public static void main(String[] args) {\r\n        compareTo parent = new compareTo();\r\n\r\n        List<sortTarget> list = Arrays.asList(\r\n                parent.new sortTarget("a", 1),\r\n                parent.new sortTarget("b", 2),\r\n                parent.new sortTarget("c", 3),\r\n                parent.new sortTarget("d", 4),\r\n                parent.new sortTarget("e", 5));\r\n\r\n        System.out.println("\u2605sort1\u2605");\r\n        Collections.sort(list, parent.new sort1());\r\n        for (sortTarget target : list) {\r\n            System.out.println(target.getName());\r\n        }\r\n\r\n        System.out.println();\r\n\r\n        System.out.println("\u2605sort2\u2605");\r\n        Collections.sort(list, parent.new sort2());\r\n        list.stream().map(sortTarget::getName).forEach(System.out::println);\r\n\r\n        System.out.println();\r\n\r\n        System.out.println("\u2605sort3\u2605");\r\n        Collections.sort(list, parent.new sort3());\r\n        for (sortTarget target : list) {\r\n            System.out.println(target.getName());\r\n        }\r\n\r\n        System.out.println();\r\n\r\n        System.out.println("\u2605sort4\u2605");\r\n        Collections.sort(list, parent.new sort4());\r\n        for (sortTarget target : list) {\r\n            System.out.println(target.getName());\r\n        }\r\n    }\r\n\r\n    public class sortTarget {\r\n\r\n        private String name;\r\n        private int key;\r\n\r\n        public sortTarget() {\r\n        }\r\n\r\n        public sortTarget(String name, int key) {\r\n            this.name = name;\r\n            this.key = key;\r\n        }\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 int getKey() {\r\n            return key;\r\n        }\r\n\r\n        public void setKey(int key) {\r\n            this.key = key;\r\n        }\r\n    }\r\n\r\n    public class sort1 implements Comparator<sortTarget> {\r\n\r\n        @Override\r\n        public int compare(sortTarget o1, sortTarget o2) {\r\n            return o1.getName().compareTo(o2.getName());\r\n        }\r\n    }\r\n\r\n    public class sort2 implements Comparator<sortTarget> {\r\n\r\n        @Override\r\n        public int compare(sortTarget o1, sortTarget o2) {\r\n            return o2.getName().compareTo(o1.getName());\r\n        }\r\n    }\r\n\r\n    public class sort3 implements Comparator<sortTarget> {\r\n\r\n        @Override\r\n        public int compare(sortTarget o1, sortTarget o2) {\r\n            return o1.getKey() - o2.getKey();\r\n        }\r\n    }\r\n\r\n    public class sort4 implements Comparator<sortTarget> {\r\n\r\n        @Override\r\n        public int compare(sortTarget o1, sortTarget o2) {\r\n            return o2.getKey() - o1.getKey();\r\n        }\r\n    }\r\n}\r\n<\/pre>\n
sort2\u306e\u51fa\u529b\u6587\u3060\u3051Stream\u306b\u3057\u3066\u307f\u305f\u3002<\/span><\/p>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
\r\n\u2605sort1\u2605\r\na\r\nb\r\nc\r\nd\r\ne\r\n\r\n\u2605sort2\u2605\r\ne\r\nd\r\nc\r\nb\r\na\r\n\r\n\u2605sort3\u2605\r\na\r\nb\r\nc\r\nd\r\ne\r\n\r\n\u2605sort4\u2605\r\ne\r\nd\r\nc\r\nb\r\na\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
oracle Java SE 8 Programmer\u2161\uff08Gold\uff09\u306b\u5408\u683c\u3057\u305f\u52c9\u5f37\u65b9\u6cd5\u3068\u8a66\u9a13\u3067\u6ce8\u610f\u3057 […]<\/p>\n","protected":false},"author":1,"featured_media":575,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[134,133,132],"class_list":["post-565","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programing","tag-gold","tag-java8","tag-oracle"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/posts\/565","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=565"}],"version-history":[{"count":9,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/posts\/565\/revisions"}],"predecessor-version":[{"id":578,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/posts\/565\/revisions\/578"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=\/wp\/v2\/media\/575"}],"wp:attachment":[{"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=565"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=565"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ito-u-oti.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=565"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}