Java\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30b3\u30a2\u306e\u6982\u5ff5\u306e1\u3064\u3067\u3059\u3002Java\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u4e2d\u6838\u7684\u306a\u90e8\u5206\u3067\u3042\u308a\u3001JDK\u3060\u3051\u3067\u306a\u304fJava\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3067\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u591a\u304f\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306fJava\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5927\u91cf\u306b\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
Java\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u62bd\u8c61\u5316\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u624b\u6bb5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002Java\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u304c\u5b9f\u88c5\u3059\u308b\u5951\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306b\u3082\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u8907\u6570\u306e\u56f3\u5f62\u304b\u3089\u306a\u308b\u63cf\u753b\u3092\u4f5c\u6210\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Shape\u3068\u3044\u3046\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u3001\u7570\u306a\u308b\u7a2e\u985e\u306eShape\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5b9f\u88c5\u3059\u308b\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u5358\u7d14\u5316\u306e\u305f\u3081\u306b\u3001\u63cf\u753b\u3059\u308b\u305f\u3081\u306edraw()\u30e1\u30bd\u30c3\u30c9\u3068\u56f3\u5f62\u306e\u9762\u7a4d\u3092\u8fd4\u3059getArea()\u30e1\u30bd\u30c3\u30c9\u306e\u307f\u3092\u4fdd\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u4e0a\u8a18\u306e\u8981\u4ef6\u306b\u57fa\u3065\u3044\u3066\u3001\u79c1\u305f\u3061\u306eShape\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002Shape.java<\/p>\n
package com.scdev.design;\r\n\r\npublic interface Shape {\r\n\r\n\t\/\/implicitly public, static and final\r\n\tpublic String LABLE=\"Shape\";\r\n\t\r\n\t\/\/interface methods are implicitly abstract and public\r\n\tvoid draw();\r\n\t\r\n\tdouble getArea();\r\n}\r\n<\/code><\/pre>\nJava\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001Java\u3067\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
Java\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u5b8c\u5168\u306a\u62bd\u8c61\u5316\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u524d\u306e\u6295\u7a3f\u3067\u306f\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u62bd\u8c61\u5316\u3092\u63d0\u4f9b\u3057\u307e\u3057\u305f\u304c\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u306b\u306f\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u6301\u3064\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306f\u672c\u4f53\u3092\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3082\u3042\u308a\u307e\u305b\u3093\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5c5e\u6027\u306fpublic\u3001static\u3001final\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5c5e\u6027\u306b\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u3092\u63d0\u4f9b\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u63d0\u4f9b\u3057\u305f\u5834\u5408\u3067\u3082\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u30a8\u30e9\u30fc\u3092\u5831\u544a\u3057\u307e\u305b\u3093\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u6697\u9ed9\u7684\u306b\u62bd\u8c61\u3067public\u3067\u3059\u3002\u3053\u308c\u306f\u5b8c\u5168\u306b\u7406\u89e3\u3067\u304d\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u672c\u4f53\u304c\u306a\u3044\u305f\u3081\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u304c\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3092\u63d0\u4f9b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3069\u306e\u30af\u30e9\u30b9\u3082\u7d99\u627f\u3067\u304d\u307e\u305b\u3093\u304c\u3001\u4ed6\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d99\u627f\u3059\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3059\u3002public interface Shape extends Cloneable{}\u306f\u3001\u5225\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d99\u627f\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u4f8b\u3067\u3059\u3002\u5b9f\u969b\u3001Java\u3067\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u8907\u6570\u306e\u7d99\u627f\u304c\u53ef\u80fd\u3067\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
implements\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001\u30af\u30e9\u30b9\u304c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30af\u30e9\u30b9\u306f\u3001\u62bd\u8c61\u30af\u30e9\u30b9\u3067\u306a\u3044\u9650\u308a\u3001\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3092\u63d0\u4f9b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e0a\u8a18\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6b21\u306e\u3088\u3046\u306b\u62bd\u8c61\u30af\u30e9\u30b9\u3067\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059: ShapeAbs.java<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30d1\u30c3\u30b1\u30fc\u30b8com.scdev.design;<\/ol>\n<\/li>\n<\/ol>\npublic abstract class ShapeAbs implements Shape {<\/p>\n
@Override
\npublic double getArea() {
\nreturn 0;
\n}<\/p>\n
}
\n\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u88c5\u306b\u95a2\u9023\u4ed8\u3051\u3066\u66f8\u304f\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u5c06\u6765\u7684\u306b\u3082\u3063\u3068\u826f\u3044\u5b9f\u88c5\u304c\u73fe\u308c\u305f\u5834\u5408\u306b\u5bb9\u6613\u306b\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u5e38\u306b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u89b3\u70b9\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3059\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n
Java\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u4f8b<\/h3>\n
\u4eca\u5ea6\u306f\u3001Java\u3067Shape\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u3092\u3044\u304f\u3064\u304b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002Circle.java<\/p>\n
package com.scdev.design;\r\n\r\npublic class Circle implements Shape {\r\n\r\n\tprivate double radius;\r\n\r\n\tpublic Circle(double r){\r\n\t\tthis.radius = r;\r\n\t}\r\n\t\r\n\t@Override\r\n\tpublic void draw() {\r\n\t\tSystem.out.println(\"Drawing Circle\");\r\n\t}\r\n\t\r\n\t@Override\r\n\tpublic double getArea(){\r\n\t\treturn Math.PI*this.radius*this.radius;\r\n\t}\r\n\r\n\tpublic double getRadius(){\r\n\t\treturn this.radius;\r\n\t}\r\n}\r\n<\/code><\/pre>\n\u5186\u30af\u30e9\u30b9\u304c\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3057\u3066\u304a\u308a\u3001\u3055\u3089\u306bgetRadius()\u306e\u3088\u3046\u306a\u72ec\u81ea\u306e\u30e1\u30bd\u30c3\u30c9\u3082\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u306f\u8907\u6570\u306e\u30bf\u30a4\u30d7\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3067\u306f\u3001Shape\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u3082\u3046\u4e00\u3064\u306e\u5b9f\u88c5\u3067\u3042\u308bRectangle.java\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
package com.scdev.design;\r\n\r\npublic class Rectangle implements Shape {\r\n\r\n\tprivate double width;\r\n\tprivate double height;\r\n\t\r\n\tpublic Rectangle(double w, double h){\r\n\t\tthis.width=w;\r\n\t\tthis.height=h;\r\n\t}\r\n\t@Override\r\n\tpublic void draw() {\r\n\t\tSystem.out.println(\"Drawing Rectangle\");\r\n\t}\r\n\r\n\t@Override\r\n\tpublic double getArea() {\r\n\t\treturn this.height*this.width;\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306e\u6ce8\u91c8\u306e\u4f7f\u7528\u306b\u6ce8\u610f\u3057\u3001Java\u306e\u6ce8\u91c8\u306b\u3064\u3044\u3066\u5b66\u3073\u3001Java\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u969b\u306b\u306f\u5e38\u306b\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306e\u6ce8\u91c8\u3092\u4f7f\u7528\u3059\u308b\u3079\u304d\u3067\u3042\u308b\u7406\u7531\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u4ee5\u4e0b\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7528\u3044\u3066\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u305f\u30c6\u30b9\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4f8b\u3067\u3059\u3002ShapeTest.java<\/p>\n
package com.scdev.design;\r\n\r\npublic class ShapeTest {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\r\n\t\t\/\/programming for interfaces not implementation\r\n\t\tShape shape = new Circle(10);\r\n\t\t\r\n\t\tshape.draw();\r\n\t\tSystem.out.println(\"Area=\"+shape.getArea());\r\n\t\t\r\n\t\t\/\/switching from one implementation to another easily\r\n\t\tshape=new Rectangle(10,10);\r\n\t\tshape.draw();\r\n\t\tSystem.out.println(\"Area=\"+shape.getArea());\r\n\t\t}\r\n\r\n}\r\n<\/code><\/pre>\n\u4e0a\u8a18\u306eJava\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u4f8b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51fa\u529b\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n
Drawing Circle\r\nArea=314.1592653589793\r\nDrawing Rectangle\r\nArea=100.0\r\n<\/code><\/pre>\nJava \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5229\u70b9<\/h3>\n\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u3059\u3079\u3066\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u306b\u5bfe\u3059\u308b\u5951\u7d04\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u7528\u8a9e\u3067\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3059\u308b\u3053\u3068\u306f\u826f\u3044\u3067\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u5b9f\u88c5\u30af\u30e9\u30b9\u306f\u79c1\u305f\u3061\u304c\u4f7f\u7528\u3057\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
\n- \n
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30bf\u30a4\u30d7\u3092\u5b9a\u7fa9\u3057\u3001\u30b3\u30fc\u30c9\u5185\u306e\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u306e\u968e\u5c64\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306e\u8d77\u70b9\u3068\u3057\u3066\u5f79\u7acb\u3061\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n <\/p>\n
Java\u306e\u30af\u30e9\u30b9\u306f\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u306f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3068\u3057\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3088\u308a\u826f\u3044\u3067\u3059\u3002<\/ol>\nJava\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/h3>\n
\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u591a\u304f\u306e\u5229\u70b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u6b20\u70b9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
\n- \n
\u79c1\u305f\u3061\u306f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u8a08\u6642\u306b\u975e\u5e38\u306b\u6ce8\u610f\u3057\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u5f8c\u304b\u3089\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304b\u3089\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u307e\u305f\u306f\u524a\u9664\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u305a\u3001\u305d\u306e\u7d50\u679c\u3001\u3059\u3079\u3066\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u79c1\u305f\u3061\u306e\u30b3\u30fc\u30c9\u3067\u306f\u30d9\u30fc\u30b9\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u62e1\u5f35\u3059\u308b\u3088\u3046\u306a\u591a\u304f\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u5fc5\u8981\u306b\u306a\u308a\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n\u5b9f\u88c5\u30af\u30e9\u30b9\u306b\u72ec\u81ea\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u5834\u5408\u3001\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u76f4\u63a5\u30b3\u30fc\u30c9\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u306a\u305c\u306a\u3089\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u306f\u305d\u306e\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001shape.getRadius()\u306e\u90e8\u5206\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001\u578b\u30ad\u30e3\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3066\u6b21\u306e\u3088\u3046\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a
\nCircle c = (Circle) shape;
\nc.getRadius();<\/p>\n
\u305f\u3060\u3057\u3001\u30af\u30e9\u30b9\u306e\u578b\u30ad\u30e3\u30b9\u30c8\u306b\u306f\u6b20\u70b9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u304c\u79c1\u304cJava\u3067\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u3064\u3044\u3066\u6301\u3063\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002Java\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u3088\u304f\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u305d\u306e\u7279\u5fb4\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u7528\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30d6\u30af\u30e9\u30b9\u3068\u306e\u5951\u7d04\u3068\u3057\u3066\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8ffd\u8a18\uff1aJava 8\u3067\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30e1\u30bd\u30c3\u30c9\u3068\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\u304c\u5909\u308f\u308a\u307e\u3057\u305f\u3002\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001Java 8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u30b3\u30a2\u306e\u6982\u5ff5\u306e1\u3064\u3067\u3059\u3002Java\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u4e2d\u6838\u7684\u306a\u90e8\u5206\u3067\u3042\u308a\u3001JDK\u3060\u3051\u3067\u306a\u304fJava\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3067\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u591a\u304f\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306fJava […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-848","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\n
Java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\" \/>\n<meta property=\"og:description\" content=\"Java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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