{"id":1928,"date":"2022-02-12T12:33:39","date_gmt":"2022-02-12T04:33:39","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1928"},"modified":"2022-02-12T12:33:39","modified_gmt":"2022-02-12T04:33:39","slug":"%e6%a1%a5%e6%8e%a5%e6%a8%a1%e5%bc%8fbridge","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1928","title":{"rendered":"\u6865\u63a5\u6a21\u5f0fbridge"},"content":{"rendered":"\n

\u9632\u6b62\u7ee7\u627f\u7206\u70b8\uff0c\u628a\u7c7b\u7684\u53d8\u5316\u8fdb\u884c\u7eac\u5ea6\u7684\u5212\u5206\u3002<\/p>\n\n\n\n

\u5047\u8bbe\u4f7f\u7528\u8721\u7b14\u4f5c\u753b\uff0c\u60f3\u8981\u753b\u51fa3\u79cd\u4e0d\u540c\u7c97\u7ec6\uff0c12\u79cd\u989c\u8272\uff0c\u90a3\u4e48\u9700\u898136\u4e2a\u578b\u53f7\u7684\u7b14\uff08\u7c7b\uff09\u3002\u5982\u679c\u6211\u4eec\u5212\u5206\u4e4b\u540e\uff0c\u7b14\u5c16\u4f5c\u4e3a\u4e00\u4e2a\u7eac\u5ea6\uff0c\u989c\u8272\u4f5c\u4e3a\u4e00\u4e2a\u7eac\u5ea6\uff0c\u53ea\u9700\u89813+12=15\u4e2a\u7c7b\uff0c\u4f8b\u5b50\u53ef\u80fd\u4e0d\u592a\u5b9e\u9645\uff0c\u4e0d\u8fc7\u6bd4\u8f83\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n\n\n\n

\u524d\u9762\u7684\u753b\u7b14\u5c31\u662f\u591a\u4e2a\u7ee7\u627f\uff08\u7b14\u578b\u53f7\u548c\u989c\u6599\u4e00\u8d77\u5f71\u54cd\u8721\u7b14\uff09\uff0c\u540e\u9762\u7684\u753b\u7b14\u5c31\u662f\u6865\u63a5\u6a21\u5f0f\uff08\u7b14\u4e0d\u540c\u578b\u53f7\u662f\u4e00\u4e2a\u53d8\u5316\u7ef4\u5ea6\uff0c\u4e0d\u540c\u989c\u8272\u7684\u989c\u6599\u662f\u4e00\u4e2a\u53d8\u5316\u7ef4\u5ea6\uff0c\u4e24\u4e2a\u7ef4\u5ea6\u4e0d\u76f8\u4e92\u5f71\u54cd\uff09<\/span>\u3002\u7406\u89e3\u4ee5\u540e\u6211\u4eec\u5c06\u5176\u62bd\u8c61\u6210\u4ee3\u7801\u63cf\u8ff0\uff1a<\/p>\n\n\n\n

pen\u7c7b\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u91cc\u9762\u6709\u4e00\u4e2a\u65b9\u6cd5draw()\u3002\u6211\u4eec\u60f3\u8981\u4f7f\u7528\u753b\u7b14\uff0c\u5219\u9700\u8981\u653e\u5165\u4e00\u79cd\u989c\u8272\uff0c\u7136\u540e\u6267\u884cdraw\u65b9\u6cd5\u5c06\u8fd9\u79cd\u989c\u8272\u753b\u51fa\u6765\u3002<\/p>\n\n\n\n

public abstract class Pen {\n    public abstract void draw(Color color);\n}<\/pre>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u7ee7\u627fpen\u8fd9\u4e2a\u62bd\u8c61\u7c7b\uff0c\u6765\u5b9e\u73b0\u591a\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7b14\u3002<\/p>\n\n\n\n
public class PenOne extends Pen {\n    public void draw(Color color) {\n        System.out.println(\"\u5f53\u524d\u4e00\u53f7\u7b14\u5728\u4f7f\u7528\" + color.use() + \"\u753b\u753b\");    \n    }\n}\npublic class PenTwo extends Pen {\n    public void draw(Color color) {\n        System.out.println(\"\u5f53\u524d\u4e8c\u53f7\u7b14\u5728\u4f7f\u7528\" + color.use() + \"\u753b\u753b\");    \n    }\n}<\/pre>\n\n\n\n
color\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5b9e\u73b0\u7c7b\u6709red\uff0cblue\u7b49\u7b49\u82e5\u5e72\u3002<\/p>\n\n\n\n
public interface Color {\n\n    public String use();\n}\npublic class Blue implements Color {\n    public String use() {\n        return \"\u84dd\u8272\";    \n    }\n}\npublic class Red implements Color {\n    public String use() {\n        return \"\u7ea2\u8272\";    \n    }\n}<\/pre>\n\n\n\n
\u7136\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u753b\u753b\u4e86\uff1a<\/p>\n\n\n\n
public class User {\n    public static void main(String[] args) {\n        Pen pen = new PenOne();        \n        pen.draw(new Red());    \n    }\n}<\/pre>\n\n\n\n
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\u8fd9\u65f6\u6211\u4eec\u62d3\u5c55\u4e00\u79cd\u578b\u53f7\u7684\u753b\u7b14\u53ea\u9700\u8981\u65b0\u589e\u4e00\u4e2aPen\u7684\u5b9e\u73b0\u7c7b\u5373\u53ef\uff0c\u989c\u6599\u76d2\u7c7b\u4e0d\u53d7\u5f71\u54cd\uff1b\u540c\u7406\u62d3\u5c55\u989c\u6599\u7684\u6570\u91cf\uff0c\u753b\u7b14\u4e0d\u53d7\u5f71\u54cd\u3002<\/span><\/p>\n\n\n\n
\u6865\u63a5\u6a21\u5f0f | \u83dc\u9e1f\u6559\u7a0b (runoob.com)<\/a> \u53c2\u8003\u6587\u672b\u7684\u7b14\u8bb0\uff0c\u611f\u8c22\u8fd9\u4f4d\u670b\u53cb\u7684\u7b14\u8bb0\u3002<\/p>\n\n\n\n
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