{"id":202762,"date":"2025-05-22T09:45:57","date_gmt":"2025-05-22T01:45:57","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202762\/"},"modified":"2025-05-22T09:45:57","modified_gmt":"2025-05-22T01:45:57","slug":"java-%e5%87%bd%e6%95%b0%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90%e5%a6%82%e4%bd%95%e5%bd%b1%e5%93%8d%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%e5%8e%9f%e5%88%99%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202762\/","title":{"rendered":"Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5f71\u54cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u539f\u5219\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5f71\u54cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u539f\u5219\uff1f<\/h1>\n

IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aJava \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5f71\u54cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u539f\u5219\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

Java \u4e2d\uff0c\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5f71\u54cd\u4e86\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001\u6027\u7b49 OOP \u539f\u5219\uff1a\u5c01\u88c5\uff1aprivate \u8bbf\u95ee\u6743\u9650\u9690\u85cf\u6570\u636e\u548c\u65b9\u6cd5\uff0c\u786e\u4fdd\u4ec5\u540c\u7c7b\u5185\u53ef\u8bbf\u95ee\u3002\u7ee7\u627f\uff1a\u53d7\u4fdd\u62a4\u7684\u8bbf\u95ee\u6743\u9650\u5141\u8bb8\u591a\u6001\u6027\u548c\u5b50\u7c7b\u8bbf\u95ee\u7ee7\u627f\u7684\u65b9\u6cd5\u3002\u591a\u6001\u6027\uff1a\u516c\u5171\u8bbf\u95ee\u6743\u9650\u5141\u8bb8\u6240\u6709\u7c7b\u8bbf\u95ee\u8986\u76d6\u7684\u65b9\u6cd5\uff0c\u5b9e\u73b0\u6d3e\u751f\u7c7b\u652f\u6301\u4e0d\u540c\u7684\u884c\u4e3a\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5bf9\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u539f\u5219\u7684\u5f71\u54cd<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u63a7\u5236\u7740\u5176\u4ed6\u7c7b\u548c\u5bf9\u8c61\u5982\u4f55\u8bbf\u95ee\u8be5\u51fd\u6570\u3002\u5b83\u5bf9\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b (OOP) \u539f\u5219\u4ea7\u751f\u4e86\u6df1\u8fdc\u7684\u5f71\u54cd\uff0c\u7279\u522b\u662f\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001\u6027\u3002<\/p>\n

\u5c01\u88c5<\/strong><\/p>\n

\u5c01\u88c5\u662f\u5728\u7c7b\u5185\u90e8\u9690\u85cf\u6570\u636e\u548c\u5b9e\u73b0\u7ec6\u8282\u7684\u884c\u4e3a\u3002Java \u4e2d\u7684 private \u8bbf\u95ee\u6743\u9650\u5f3a\u5236\u6267\u884c\u5c01\u88c5\uff0c\u786e\u4fdd\u53ea\u6709\u540c\u7c7b\u5185\u7684\u65b9\u6cd5\u53ef\u4ee5\u8bbf\u95ee\u5185\u90e8\u6570\u636e\u548c\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/p>\n

public class MyClass {\n    private int value;\n\n    public int getValue() {\n        return value;\n    }\n\n    public void setValue(int value) {\n        this.value = value;\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cvalue<\/code> \u53d8\u91cf\u662f\u79c1\u6709\u7684\uff0c\u53ea\u6709 MyClass<\/code> \u4e2d\u7684\u65b9\u6cd5\u53ef\u4ee5\u8bbf\u95ee\u5b83\u3002\u5176\u4ed6\u7c7b\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u6216\u4fee\u6539 value<\/code>\u3002<\/p>\n
\u7ee7\u627f<\/strong><\/p>\n
\u7ee7\u627f\u5141\u8bb8\u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\u3002\u53d7\u4fdd\u62a4\u7684\u8bbf\u95ee\u6743\u9650 (protected) \u5141\u8bb8\u5b50\u7c7b\u548c\u5176\u4ed6\u5305\u4e2d\u7684\u7c7b\u8bbf\u95ee\u7ee7\u627f\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/p>\n
public class ParentClass {\n    protected int parentValue;\n}\n\npublic class ChildClass extends ParentClass {\n    public void accessParentValue() {\n        System.out.println(parentValue);\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cparentValue<\/code> \u662f\u53d7\u4fdd\u62a4\u7684\uff0c\u8fd9\u610f\u5473\u7740\u53ea\u6709 ParentClass<\/code>\u3001ChildClass<\/code> \u548c\u5176\u4ed6\u5305\u4e2d\u7684\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5b83\u3002<\/p>\n
\u591a\u6001\u6027<\/strong><\/p>\n
\u591a\u6001\u6027\u5141\u8bb8\u6d3e\u751f\u7c7b\u8986\u76d6\u7236\u7c7b\u7684\u65b9\u6cd5\u3002\u516c\u5f00\u8bbf\u95ee\u6743\u9650 (public) \u5141\u8bb8\u6240\u6709\u7c7b\u8bbf\u95ee\u8986\u76d6\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<\/p>\n
public class Animal {\n    public void makeSound() {\n        System.out.println(\"Generic animal sound\");\n    }\n}\n\npublic class Dog extends Animal {\n    @Override\n    public void makeSound() {\n        System.out.println(\"Woof!\");\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cmakeSound()<\/code> \u65b9\u6cd5\u662f\u516c\u5f00\u7684\uff0c\u8fd9\u610f\u5473\u7740\u6240\u6709\u7c7b\u90fd\u53ef\u4ee5\u8c03\u7528\u5b83\u3002\u5f53\u8c03\u7528 Dog<\/code> \u5bf9\u8c61\u7684 makeSound()<\/code> \u65b9\u6cd5\u65f6\uff0c\u5b83\u4f1a\u8c03\u7528\u6d3e\u751f\u7c7b\u7684\u8986\u76d6\u65b9\u6cd5\uff0c\u4ece\u800c\u6f14\u793a\u4e86\u591a\u6001\u6027\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4e00\u4e2a\u94f6\u884c\u8d26\u6237\u5e94\u7528\u7a0b\u5e8f\uff1a<\/p>\n
public class BankAccount {\n    private double balance;\n\n    public double getBalance() {\n        return balance;\n    }\n\n    public void deposit(double amount) {\n        balance += amount;\n    }\n}<\/pre>\n
\u5c06 balance<\/code> \u8bbe\u7f6e\u4e3a\u79c1\u6709\u786e\u4fdd\u4e86\u5c01\u88c5\u3002\u5ba2\u6237\u53ea\u80fd\u901a\u8fc7 getBalance()<\/code> \u548c deposit()<\/code> \u65b9\u6cd5\u8bbf\u95ee\u548c\u4fee\u6539\u4f59\u989d\u3002\u8fd9\u6837\u53ef\u4ee5\u9632\u6b62\u5916\u90e8\u4ee3\u7801\u64cd\u7eb5\u8d26\u6237\u4fe1\u606f\u3002<\/p>\n
\u7ed3\u8bba<\/strong><\/p>\n
Java \u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5bf9 OOP \u539f\u5219\u81f3\u5173\u91cd\u8981\u3002\u5b83\u901a\u8fc7\u5f3a\u5236\u5c01\u88c5\uff0c\u652f\u6301\u7ee7\u627f\u548c\u4fc3\u8fdb\u591a\u6001\u6027\u6765\u5f71\u54cd\u8bbe\u8ba1\u548c\u5b9e\u73b0\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300aJava \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5f71\u54cd\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u539f\u5219\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8ejava,\u6743\u9650\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Java \u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5f71\u54cd\u9762...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202762","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202762","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202762"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202762\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}