{"id":73,"date":"2015-03-30T10:51:49","date_gmt":"2015-03-30T02:51:49","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=73"},"modified":"2026-08-18T11:41:07","modified_gmt":"2026-08-18T03:41:07","slug":"java%e8%ae%bf%e9%97%ae%e4%bf%ae%e9%a5%b0%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=73","title":{"rendered":"Java\u8bbf\u95ee\u4fee\u9970\u7b26"},"content":{"rendered":"
\n

Java \u7528\u4fee\u9970\u7b26\u63a7\u5236\u7c7b\u3001\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u4ee5\u53ca\u5176\u4ed6\u80fd\u529b\uff0c\u901a\u5e38\u5199\u5728\u8bed\u53e5\u6700\u524d\u9762\u3002\u4f8b\u5982\uff1a<\/p>\n

public class className {\n    \/\/ body of class\n}\nprivate boolean myFlag;\nstatic final double weeks = 9.5;\nprotected static final int BOXWIDTH = 42;\npublic static void main(String[] arguments) {\n    \/\/ body of method\n}<\/code><\/pre>\n
<\/p>\n
\u4fee\u9970\u7b26\u5206\u8bbf\u95ee\u4fee\u9970\u7b26\u548c\u975e\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\u672c\u8282\u53ea\u8bb2\u8bbf\u95ee\u4fee\u9970\u7b26<\/strong>\uff08\u4e5f\u53eb\u8bbf\u95ee\u63a7\u5236\u7b26\uff09\uff1a\u80fd\u7ba1\u4f4f\u7c7b\u3001\u6210\u5458\u53d8\u91cf\u3001\u65b9\u6cd5\u80fd\u88ab\u8c01\u7528\u7684\u90a3\u51e0\u4e2a\u5173\u952e\u5b57\u3002\u9762\u5411\u5bf9\u8c61\u91cc\uff0c\u5b83\u4eec\u5c31\u662f\u7528\u6765\u4fdd\u62a4\u7c7b\u3001\u53d8\u91cf\u3001\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\u7684\u90a3\u9053\u95e8\u3002<\/p>\n
\u4e00\u3001\u56db\u79cd\u8bbf\u95ee\u6743\u9650<\/h2>\n
Java \u652f\u6301\u56db\u79cd\u8bbf\u95ee\u6743\u9650\uff1a<\/p>\n
\"c\"<\/a><\/p>\n\n\n\n\n\n\n\n\n
\u4fee\u9970\u7b26<\/th>\n\u8c01\u80fd\u8bbf\u95ee<\/th>\n\u6ce8\u610f<\/th>\n<\/tr>\n<\/thead>\n
public<\/td>\n\u4efb\u4f55\u5176\u4ed6\u7c7b<\/td>\n\u8de8\u5305\u8981 import\uff1b\u516c\u6709\u65b9\u6cd5\u548c\u53d8\u91cf\u4f1a\u88ab\u5b50\u7c7b\u7ee7\u627f\uff1bmain \u5fc5\u987b\u662f public<\/td>\n<\/tr>\n
protected<\/td>\n\u540c\u5305\u4efb\u610f\u7c7b + \u4e0d\u540c\u5305\u7684\u5b50\u7c7b<\/td>\n\u4e0d\u80fd\u4fee\u9970\u7c7b\u548c\u63a5\u53e3<\/td>\n<\/tr>\n
\u9ed8\u8ba4\uff08\u4e0d\u5199\uff09<\/td>\n\u540c\u4e00\u4e2a\u5305\u5185\u53ef\u89c1<\/td>\n\u63a5\u53e3\u91cc\u7684\u53d8\u91cf\u9690\u5f0f public static final\uff0c\u65b9\u6cd5\u9ed8\u8ba4 public<\/td>\n<\/tr>\n
private<\/td>\n\u53ea\u80fd\u88ab\u6240\u5c5e\u7c7b\u8bbf\u95ee<\/td>\n\u7c7b\u548c\u63a5\u53e3\u4e0d\u80fd\u58f0\u660e\u4e3a private\uff1b\u5bf9\u5916\u7528 Getter \/ Setter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u4e8c\u3001public\uff1a\u516c\u6709\u7684<\/h2>\n
\u58f0\u660e\u4e3a public \u7684\u7c7b\u3001\u65b9\u6cd5\u3001\u6784\u9020\u65b9\u6cd5\u548c\u63a5\u53e3\uff0c\u80fd\u88ab\u4efb\u4f55\u5176\u4ed6\u7c7b\u8bbf\u95ee\u3002\u51e0\u4e2a public \u7c7b\u82e5\u4e0d\u5728\u540c\u4e00\u4e2a\u5305\uff0c\u9700\u8981\u5bfc\u5165\u5bf9\u65b9\u6240\u5728\u7684\u5305\u3002\u56e0\u4e3a\u6709\u7ee7\u627f\uff0c\u7c7b\u7684\u516c\u6709\u65b9\u6cd5\u548c\u53d8\u91cf\u90fd\u80fd\u88ab\u5b50\u7c7b\u7ee7\u627f\u3002<\/p>\n
\u4e0b\u9762\u7684\u65b9\u6cd5\u7528\u4e86\u516c\u6709\u8bbf\u95ee\u63a7\u5236\uff1a<\/p>\n
public static void main(String[] arguments) {\n    \/\/ body of method\n}<\/code><\/pre>\n
Java \u7a0b\u5e8f\u7684 main()<\/code> \u5fc5\u987b\u662f public\uff0c\u5426\u5219\u89e3\u91ca\u5668\u8dd1\u4e0d\u8d77\u6765\u3002<\/p>\n
\u4e09\u3001protected\uff1a\u53d7\u4fdd\u62a4\u7684<\/h2>\n
\u58f0\u660e\u4e3a protected \u7684\u53d8\u91cf\u3001\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\uff1a\u540c\u4e00\u4e2a\u5305\u91cc\u8c01\u90fd\u80fd\u7528\uff0c\u4e0d\u540c\u5305\u91cc\u53ea\u6709\u5b50\u7c7b\u80fd\u7528\u3002\u5b83\u4e0d\u80fd\u4fee\u9970\u7c7b\u548c\u63a5\u53e3<\/strong>\uff1b\u65b9\u6cd5\u548c\u6210\u5458\u53d8\u91cf\u53ef\u4ee5\u662f protected\uff0c\u63a5\u53e3\u7684\u6210\u5458\u4e0d\u884c\u3002<\/p>\n
\u5b50\u7c7b\u80fd\u8bbf\u95ee\u7236\u7c7b\u7684 protected \u65b9\u6cd5\u548c\u53d8\u91cf\uff0c\u4e0d\u76f8\u5173\u7684\u7c7b\u5c31\u8fdb\u4e0d\u53bb\u3002\u4e0b\u9762\u7236\u7c7b\u7528\u4e86 protected\uff0c\u5b50\u7c7b\u91cd\u5199\u4e86 bark()<\/code>\uff1a<\/p>\n
public class Dog {\n    protected void bark() {\n        System.out.println(\"\u6c6a\u6c6a\uff0c\u4e0d\u8981\u8fc7\u6765\");\n    }\n}\n\nclass Teddy extends Dog {  \/\/ \u6cf0\u8fea\n    void bark() {\n        System.out.println(\"\u6c6a\u6c6a\uff0c\u6211\u597d\u6015\uff0c\u4e0d\u8981\u8ddf\u7740\u6211\");\n    }\n}<\/code><\/pre>\n
\u82e5\u628a bark()<\/code> \u6539\u6210 private\uff0c\u9664\u4e86 Dog \u8c01\u90fd\u8fdb\u4e0d\u53bb\uff1b\u6539\u6210 public\uff0c\u6240\u6709\u7c7b\u90fd\u80fd\u8fdb\u3002\u53ea\u60f3\u7ed9\u5b50\u7c7b\u770b\u89c1\uff0c\u5c31\u7528 protected\u3002<\/p>\n
\u56db\u3001private\uff1a\u79c1\u6709\u7684<\/h2>\n
private \u6700\u4e25\uff1a\u65b9\u6cd5\u3001\u53d8\u91cf\u3001\u6784\u9020\u65b9\u6cd5\u53ea\u80fd\u88ab\u6240\u5c5e\u7c7b\u8bbf\u95ee\u3002\u7c7b\u548c\u63a5\u53e3\u4e0d\u80fd\u58f0\u660e\u4e3a private\u3002\u79c1\u6709\u53d8\u91cf\u5bf9\u5916\u53ea\u80fd\u8d70\u516c\u5171\u7684 Getter \/ Setter\uff0c\u7528\u6765\u85cf\u5b9e\u73b0\u7ec6\u8282\u3001\u4fdd\u62a4\u6570\u636e\u3002<\/p>\n
public class Dog {\n    private String name;\n    private int age;\n\n    public String getName() {\n        return name;\n    }\n    public void setName(String name) {\n        this.name = name;\n    }\n    public int getAge() {\n        return age;\n    }\n    public void setAge(int age) {\n        this.age = age;\n    }\n}<\/code><\/pre>\n
name<\/code>\u3001age<\/code> \u662f\u79c1\u6709\u7684\uff0c\u522b\u7684\u7c7b\u4e0d\u80fd\u76f4\u63a5\u8bfb\u6539\u3002\u4e8e\u662f\u63d0\u4f9b\u4e24\u5bf9 public \u65b9\u6cd5\uff1agetName()<\/code> \/ setName()<\/code>\u3001getAge()<\/code> \/ setAge()<\/code>\u3002<\/p>\n
this<\/code> \u662f Java \u5173\u952e\u5b57\uff0c\u53ef\u5148\u770b\u7ad9\u5185\u300aJava this\u5173\u952e\u5b57\u8be6\u89e3\u300b\u3002\u8bbf\u95ee\u79c1\u6709\u53d8\u91cf\u7684\u65b9\u6cd5\u4e60\u60ef\u547d\u540d\uff1a\u53d8\u91cf\u540d\u524d\u52a0 get \/ set\uff0c\u5e76\u628a\u9996\u5b57\u6bcd\u5927\u5199\uff0c\u4e5f\u5c31\u662f\u5e38\u8bf4\u7684 Getter \u548c Setter\u3002<\/p>\n
\u4e94\u3001\u9ed8\u8ba4\uff1a\u4e0d\u5199\u4efb\u4f55\u5173\u952e\u5b57<\/h2>\n
\u4e0d\u5199\u4fee\u9970\u7b26\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5bf9\u540c\u4e00\u4e2a\u5305\u5185\u7684\u7c7b\u53ef\u89c1\u3002\u63a5\u53e3\u91cc\u7684\u53d8\u91cf\u90fd\u9690\u5f0f\u58f0\u660e\u4e3a public static final<\/code>\uff0c\u63a5\u53e3\u65b9\u6cd5\u9ed8\u8ba4\u662f public\u3002<\/p>\n
class Dog {\n    String name;\n    int age;\n\n    void bark() {  \/\/ \u6c6a\u6c6a\u53eb\n        System.out.println(\"\u6c6a\u6c6a\uff0c\u4e0d\u8981\u8fc7\u6765\");\n    }\n    void hungry() {  \/\/ \u9965\u997f\n        System.out.println(\"\u4e3b\u4eba\uff0c\u6211\u997f\u4e86\");\n    }\n}<\/code><\/pre>\n
\u516d\u3001\u7ee7\u627f\u65f6\u600e\u4e48\u6536\u7d27\u3001\u653e\u5bbd<\/h2>\n
\u8fd8\u4e0d\u719f\u7ee7\u627f\u7684\u53ef\u4ee5\u5148\u8df3\u8fc7\uff0c\u6216\u53bb\u770b\u300aJava\u7ee7\u627f\u548c\u591a\u6001\u300b\u3002\u89c4\u5219\u662f\uff1a<\/p>\n
    \n
  • \n
    \u7236\u7c7b public \u7684\u65b9\u6cd5\uff0c\u5b50\u7c7b\u4e5f\u5fc5\u987b\u662f public\u3002<\/section>\n<\/li>\n
  • \n
    \u7236\u7c7b protected \u7684\u65b9\u6cd5\uff0c\u5b50\u7c7b\u53ea\u80fd\u662f protected \u6216 public\uff0c\u4e0d\u80fd\u6539\u6210 private\u3002<\/section>\n<\/li>\n
  • \n
    \u7236\u7c7b\u9ed8\u8ba4\u4fee\u9970\u7684\u65b9\u6cd5\uff0c\u5b50\u7c7b\u53ef\u4ee5\u6539\u6210 private\u3002<\/section>\n<\/li>\n
  • \n
    \u7236\u7c7b private \u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u7ee7\u627f\u3002<\/section>\n<\/li>\n<\/ul>\n
    \u60f3\u8ba9\u7c7b\u88ab\u6240\u6709\u4eba\u7528\uff0c\u5c31\u58f0\u660e\u4e3a public\uff1b\u53ea\u60f3\u7ed9\u672c\u5305\u7528\uff0c\u5c31\u7701\u7565\u4fee\u9970\u7b26\u3002\u6210\u5458\u6570\u636e\u5219\u6309\u9700\u8981\u8bbe\u6210 public\u3001protected\uff0c\u6216\u8005\u7701\u7565\u3002<\/p>\n
    \n
    \u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u80fd\u7ed9\u5168\u4e16\u754c\u7684\u7528 public\uff0c\u53ea\u7ed9\u5b50\u7c7b\u548c\u540c\u5305\u7684\u7528 protected\uff0c\u53ea\u7ed9\u540c\u5305\u7684\u5c31\u4ec0\u4e48\u90fd\u4e0d\u5199\uff0c\u85cf\u8d77\u6765\u7684\u7528 private\uff0c\u5bf9\u5916\u518d\u5f00 Getter \/ Setter\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
    Java \u7528\u4fee\u9970\u7b26\u63a7\u5236\u7c7b\u3001\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u4ee5\u53ca\u5176\u4ed6\u80fd\u529b\uff0c\u901a\u5e38\u5199\u5728\u8bed\u53e5\u6700\u524d\u9762\u3002\u4f8b\u5982\uff1a public clas […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[43],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/73"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=73"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":371,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/73\/revisions\/371"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}