Java\u3060\u3063\u305f\u304b\u3089\u3001\u3068\u3044\u3046\u7406\u7531\u3067\u9078\u3093\u3060\u672c\u3092\u8cb7\u3063\u305f\u307e\u3067\u306f\u826f\u304b\u3063\u305f\u3093\u3060\u3051\u3069\u3001\u306a\u3093\u304b\u79c1\u306e\u77e5\u3063\u3066\u308b\u306e\u3068\u9055\u3046\u3060\uff01
\n\u306a\u3093\u3066\u3053\u3068\u306b\u306a\u3063\u305f\u3093\u3067\u3001\u8aad\u3093\u3067\u8abf\u3079\u3066\u307f\u308b\u3068\u3001\u3053\u308c\u30e9\u30e0\u30c0\u3068\u3044\u3046\u3002<\/p>\n
Java8\u306b\u306a\u3063\u3066\u3001\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u30e9\u30e0\u30c0\u8a18\u6cd5\u3067\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/p>\n
\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u306f\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u304c\uff11\u3064\u3060\u3051\u3042\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u3053\u3068\u3002<\/p>\n
\u3060\u305d\u3046\u3060\u3002<\/p>\n
\u30b3\u30fc\u30c9\u3067\u66f8\u304f\u3068\u3053\u3093\u306a\u611f\u3058\u3002<\/p>\n
\r\n@FunctionalInterface\r\npublic interface Calc {\r\n public int add(int x);\r\n}\r\n<\/pre>\n\u666e\u901a\u306b\u5b9f\u88c5\u3059\u308b\u3070\u3084\u3044\u3001\u3053\u3093\u306a\u98a8\u306b\u306a\u308b\u3060\u3002<\/p>\n
\r\nCalc calcsample = new Calc() {\r\n @Override\r\n public int add(int x) {\r\n return x = x * x;\r\n }\r\n};\r\n<\/pre>\n\u30e9\u30e0\u30c0\u8a18\u6cd5\u306b\u3059\u308b\u3068\u3001\u3053\u3093\u306a\u611f\u3058\u306b\u306a\u308b\u3060\u3002<\/p>\n
\r\nCalc calcSampleLambda = (int x) -> x * x;\r\n<\/pre>\n\u77ed\u304b\u3063\uff01<\/p>\n
\u305d\u3057\u3066\u3001\u3055\u3089\u306b\u3053\u3046\u66f8\u3051\u305f\u3002<\/p>\n
\r\nCalc calcSampleLambda = x -> x * x;\r\n<\/pre>\n\u3044\u308d\u3044\u308d\u306a\u30b5\u30a4\u30c8\u3092\u898b\u3066\u56de\u3063\u3066\u6587\u7ae0\u3068\u30b3\u30fc\u30c9\u3092\u8aad\u3093\u3067\u3082\u3044\u307e\u3044\u3061\u308f\u304b\u3089\u306a\u304b\u3063\u305f\u3093\u3060\u3051\u3069\u3001\u5b9f\u969b\u306b\u81ea\u5206\u306e\u624b\u3068\u982d\u3092\u4f7f\u3063\u3066\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068\u982d\u306b\u5165\u3063\u3066\u304f\u308c\u308b\u3060\u306d\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb<\/p>\n
\r\npublic class LambdaTraining {\r\n \r\n @FunctionalInterface\r\n public interface Calc {\r\n public int add(int x);\r\n }\r\n \r\n public static void main(String[] args) {\r\n \r\n Calc calcSample = new Calc() {\r\n @Override\r\n public int add(int x) {\r\n return x = x * x;\r\n }\r\n };\r\n \r\n Calc calcSampleLambda = x -> x * x;\r\n \r\n System.out.println(calcSample.add(5));\r\n \r\n System.out.println(calcSampleLambda.add(5));\r\n }\r\n}\r\n<\/pre>\n\u5b9f\u884c\u7d50\u679c<\/p>\n
\r\nrun:\r\n25\r\n25\r\nBUILD SUCCESSFUL (total time: 0 seconds)\r\n<\/pre>\n\u30ca\u30a6\u3044\u8a00\u8a9e\u306f\u3053\u3046\u3044\u3046\u66f8\u304d\u65b9\u306b\u6163\u308c\u3066\u306a\u3044\u3068\u8aad\u307f\u3065\u3089\u3044\u306e\u3067\u3001\u7df4\u7fd2\u3059\u308b\u3060\u3088\u3002<\/p>\n