{"id":727,"date":"2023-03-23T21:50:23","date_gmt":"2023-03-23T13:50:23","guid":{"rendered":""},"modified":"2023-03-23T21:50:23","modified_gmt":"2023-03-23T13:50:23","slug":"Java \u8bbf\u95ee\u4fee\u9970\u7b26","status":"publish","type":"post","link":"https:\/\/bianchenghao6.com\/727.html","title":{"rendered":"Java \u8bbf\u95ee\u4fee\u9970\u7b26"},"content":{"rendered":"


\n <\/head>
\n <\/p>\n

\n

Java \u8bbf\u95ee\u4fee\u9970\u7b26<\/h1>\n<\/p><\/div>\n
\n Java\u4e2d\u7684\u4fee\u9970\u7b26\u6709\u4e24\u79cd:
\n \u8bbf\u95ee\u4fee\u9970\u7b26<\/strong>\u548c
\n \u975e\u8bbf\u95ee\u4fee\u9970\u7b26<\/strong>\u3002\n <\/div>\n
\n Java\u4e2d\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u6307\u5b9a\u5b57\u6bb5\uff0c\u65b9\u6cd5\uff0c\u6784\u9020\u51fd\u6570\u6216\u7c7b\u7684\u53ef\u8bbf\u95ee\u6027\u6216\u8303\u56f4\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728\u5176\u4e0a\u5e94\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\u6765\u66f4\u6539\u5b57\u6bb5\uff0c\u6784\u9020\u51fd\u6570\uff0c\u65b9\u6cd5\u548c\u7c7b\u7684\u8bbf\u95ee\u7ea7\u522b\u3002\n <\/div>\n
\n Java\u8bbf\u95ee\u4fee\u9970\u7b26\u6709\u56db\u79cd\u7c7b\u578b:\n <\/div>\n

Private: <\/strong>\u79c1\u6709\u4fee\u9970\u7b26\u7684\u8bbf\u95ee\u7ea7\u522b\u4ec5\u5728\u8be5\u7c7b\u4e4b\u5185\u3002\u4e0d\u80fd\u4ece\u73ed\u7ea7\u5916\u90e8\u8bbf\u95ee\u5b83\u3002<\/span>
\n Default: <\/strong>\u9ed8\u8ba4\u4fee\u9970\u7b26\u7684\u8bbf\u95ee\u7ea7\u522b\u4ec5\u5728\u5305\u4e2d\u3002\u4e0d\u80fd\u4ece\u8f6f\u4ef6\u5305\u5916\u90e8\u8bbf\u95ee\u5b83\u3002\u5982\u679c\u60a8\u672a\u6307\u5b9a\u4efb\u4f55\u8bbf\u95ee\u7ea7\u522b\uff0c\u5b83\u5c06\u662f\u9ed8\u8ba4\u7ea7\u522b\u3002<\/span>
\n Protected: <\/strong>\u53d7\u4fdd\u62a4\u7684\u4fee\u9970\u7b26\u7684\u8bbf\u95ee\u7ea7\u522b\u901a\u8fc7\u5b50\u7c7b\u5728\u7a0b\u5e8f\u5305\u5185\u548c\u7a0b\u5e8f\u5305\u5916\u3002\u5982\u679c\u60a8\u4e0d\u521b\u5efa\u5b50\u7c7b\uff0c\u5219\u65e0\u6cd5\u4ece\u5305\u5916\u90e8\u5bf9\u5176\u8fdb\u884c\u8bbf\u95ee\u3002<\/span>
\n Public: <\/strong>\u516c\u5171\u4fee\u6539\u5668\u7684\u8bbf\u95ee\u7ea7\u522b\u65e0\u5904\u4e0d\u5728\u3002\u53ef\u4ee5\u4ece\u7c7b\u5185\u90e8\uff0c\u7c7b\u5916\u90e8\uff0c\u5305\u5185\u90e8\u548c\u5305\u5916\u90e8\u5bf9\u5176\u8fdb\u884c\u8bbf\u95ee\u3002<\/span> <\/p>\n

\n \u6709\u8bb8\u591a\u975e\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u4f8b\u5982 static, abstract, synchronized, native, volatile\u7b49\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u4ec5\u5b66\u4e60\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\n <\/div>\n
\n

\u4e86\u89e3Java\u8bbf\u95ee\u4fee\u9970\u7b26<\/h3>\n
\n \u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u8868\u6765\u4e86\u89e3Java\u4e2d\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\n <\/div>\n\n\n\n\n\n\n\n
\u8bbf\u95ee\u4fee\u9970\u7b26<\/td>\nclass\u4e2d<\/td>\npackage\u4e2d<\/td>\n\u5b50\u7c7bpackage\u5916<\/td>\npackage\u5916<\/td>\n<\/tr>\n
Private<\/b> <\/td>\n Y <\/td>\n N <\/td>\n N <\/td>\n N <\/td>\n<\/tr>\n
Default<\/b> <\/td>\n Y <\/td>\n Y <\/td>\n N <\/td>\n N <\/td>\n<\/tr>\n
Protected<\/b> <\/td>\n Y <\/td>\n Y <\/td>\n Y <\/td>\n N <\/td>\n<\/tr>\n
Public<\/b> <\/td>\n Y <\/td>\n Y <\/td>\n Y <\/td>\n Y <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

1)Private<\/h3>\n
\n \u79c1\u6709\u8bbf\u95ee\u4fee\u9970\u7b26\u53ea\u80fd\u5728\u8be5\u7c7b\u4e2d\u8bbf\u95ee\u3002\n <\/div>\n
\n \u79c1\u6709\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u7b80\u5355\u793a\u4f8b<\/strong>\n <\/div>\n
\n \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e24\u4e2a\u7c7bA\u548cSimple\u3002\u4e00\u4e2a\u7c7b\u5305\u542b\u79c1\u6709\u6570\u636e\u6210\u5458\u548c\u79c1\u6709\u65b9\u6cd5\u3002\u6211\u4eec\u6b63\u5728\u4ece\u7c7b\u5916\u90e8\u8bbf\u95ee\u8fd9\u4e9b\u79c1\u6709\u6210\u5458\uff0c\u56e0\u6b64\u4f1a\u51fa\u73b0\u7f16\u8bd1\u65f6\u9519\u8bef\u3002\n <\/div>\n
\n
 class <\/span>A{
     private <\/span>int <\/span>data=40;
     private void <\/span>msg(){
         System.out.println<\/span>(\"Hello java\"<\/span>);
     }
 }
 public <\/span>class <\/span>Simple{
     public <\/span>static void <\/span>main(String args[]){
         A obj=new A();
         System.out.println<\/span>(obj.data);
         \/\/Compile Time Error obj.msg<\/span>();
     \/\/Compile Time Error }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\u79c1\u6709\u6784\u9020\u51fd\u6570\u7684\u4f5c\u7528<\/h3>\n
\n    \u5982\u679c\u5c06\u4efb\u4f55\u7c7b\u6784\u9020\u51fd\u6570\u8bbe\u4e3a\u79c1\u6709\uff0c\u5219\u65e0\u6cd5\u4ece\u5916\u90e8\u521b\u5efa\u8be5\u7c7b\u7684\u5b9e\u4f8b\u73ed\u7ea7\u3002\u4f8b\u5982:\n  <\/div>\n
\n
 class <\/span>A{
     private <\/span>A(){
     }
     \/\/private <\/span>constructorvoid msg(){
         System.out.println<\/span>(\"Hello java\"<\/span>);
     }
 }
 public <\/span>class <\/span>Simple{
     public <\/span>static void <\/span>main(String args[]){
         A obj=new A();
     \/\/Compile Time Error }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
\n    \u6ce8\u610f: <\/span>\u9664\u5d4c\u5957\u7c7b\u5916\uff0c\u5176\u4ed6\u7c7b\u4e0d\u80fd\u662f\u79c1\u6709\u7684\u6216\u53d7\u4fdd\u62a4\u7684\u3002\n   <\/div>\n<\/h4>\n
\n
    <\/p>\n
 2)Default<\/h3>\n
\n    \u5982\u679c\u60a8\u4e0d\u4f7f\u7528\u4efb\u4f55\u4fee\u9970\u7b26\uff0c\u5219\u5c06\u5176\u89c6\u4e3a
\n   \u9ed8\u8ba4\u503c<\/strong>\u3002\u9ed8\u8ba4\u4fee\u9970\u7b26\u53ea\u80fd\u5728\u5305\u4e2d\u8bbf\u95ee\u3002\u4e0d\u80fd\u4ece\u8f6f\u4ef6\u5305\u5916\u90e8\u8bbf\u95ee\u5b83\u3002\u5b83\u63d0\u4f9b\u4e86\u6bd4\u79c1\u6709\u66f4\u591a\u7684\u53ef\u8bbf\u95ee\u6027\u3002\u4f46\u662f\uff0c\u5b83\u6bd4\u53d7\u4fdd\u62a4\u7684\u548c\u516c\u5f00\u7684\u66f4\u5177\u9650\u5236\u6027\u3002\n  <\/div>\n
\n   \u9ed8\u8ba4\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u793a\u4f8b<\/strong>\n  <\/div>\n
\n    \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e24\u4e2a\u5305pack\u548cmypack\u3002\u6211\u4eec\u6b63\u5728\u4ece\u5176\u5305\u7684\u5916\u90e8\u8bbf\u95eeA\u7c7b\uff0c\u56e0\u4e3aA\u7c7b\u4e0d\u662f\u516c\u5171\u7684\uff0c\u56e0\u6b64\u65e0\u6cd5\u4ece\u5305\u7684\u5916\u90e8\u5bf9\u5176\u8fdb\u884c\u8bbf\u95ee\u3002\n  <\/div>\n
\n
 \/\/save by A.javapackage <\/span>pack;
 class <\/span>A{
     void msg(){
         System.out.println<\/span>(\"Hello\"<\/span>);
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
 \/\/save by B.javapackage <\/span>mypack;
 import pack.*;
 class <\/span>B{
     public <\/span>static void <\/span>main(String args[]){
         A obj = new <\/span>A();
         \/\/Compile Time Error obj.msg<\/span>();
     \/\/Compile Time Error }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u7c7bA\u7684\u8303\u56f4\u53ca\u5176\u65b9\u6cd5msg()\u662f\u9ed8\u8ba4\u7684\uff0c\u56e0\u6b64\u65e0\u6cd5\u4ece\u7a0b\u5e8f\u5305\u5916\u90e8\u5bf9\u5176\u8fdb\u884c\u8bbf\u95ee\u3002\n  <\/div>\n
\n
    <\/p>\n
 3)Protected<\/h3>\n
\n   \u53d7\u4fdd\u62a4\u7684\u8bbf\u95ee\u4fee\u9970\u7b26<\/b>\u53ef\u4ee5\u5728\u7a0b\u5e8f\u5305\u5185\u548c\u5916\u90e8\u8bbf\u95ee\u5305\uff0c\u4f46\u4ec5\u901a\u8fc7\u7ee7\u627f\u3002\n  <\/div>\n
\n    \u53d7\u4fdd\u62a4\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u53ef\u4ee5\u5e94\u7528\u4e8e\u6570\u636e\u6210\u5458\uff0c\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u3002\u5b83\u4e0d\u80fd\u5e94\u7528\u4e8e\u8bfe\u7a0b\u3002\n  <\/div>\n
\n    \u5b83\u63d0\u4f9b\u4e86\u6bd4\u9ed8\u8ba4\u4fee\u9970\u7b26\u66f4\u591a\u7684\u53ef\u8bbf\u95ee\u6027\u3002\n  <\/div>\n
\n   \u53d7\u4fdd\u62a4\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u793a\u4f8b<\/strong>\n  <\/div>\n
\n    \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e24\u4e2a\u5305pack\u548cmypack\u3002 A\u7c7b\u5305\u8f6f\u4ef6\u5305\u662f\u516c\u5171\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u4ece\u5305\u5916\u90e8\u8fdb\u884c\u8bbf\u95ee\u3002\u4f46\u662f\u8be5\u7a0b\u5e8f\u5305\u7684msg\u65b9\u6cd5\u88ab\u58f0\u660e\u4e3a\u53d7\u4fdd\u62a4\u7684\uff0c\u56e0\u6b64\u53ea\u80fd\u901a\u8fc7\u7ee7\u627f\u4ece\u7c7b\u5916\u90e8\u8bbf\u95ee\u5b83\u3002\n  <\/div>\n
\n
 \/\/save by A.javapackage <\/span>pack;
 public <\/span>class <\/span>A{
     protected void <\/span>msg(){
         System.out.println<\/span>(\"Hello\"<\/span>);
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
 \/\/save by B.javapackage <\/span>mypack;
 import pack.*;
 class <\/span>B extends <\/span>A{
     public <\/span>static void <\/span>main(String args[]){
         B obj = new <\/span>B();
         obj.msg<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
 Output:Hello
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
 4)Public<\/h3>\n
\n   \u516c\u5171\u8bbf\u95ee\u4fee\u9970\u7b26<\/strong>\u968f\u5904\u53ef\u89c1\u3002\u5728\u6240\u6709\u5176\u4ed6\u4fee\u9970\u7b26\u4e2d\uff0c\u5b83\u5177\u6709\u6700\u5e7f\u6cdb\u7684\u8303\u56f4\u3002\n  <\/div>\n
\n   \u516c\u5171\u8bbf\u95ee\u4fee\u9970\u7b26\u793a\u4f8b<\/strong>\n  <\/div>\n
\n
 \/\/save by A.javapackage <\/span>pack;
 public <\/span>class <\/span>A{
     public void <\/span>msg(){
         System.out.println<\/span>(\"Hello\"<\/span>);
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
 \/\/save by B.javapackage <\/span>mypack;
 import pack.*;
 class <\/span>B{
     public <\/span>static void <\/span>main(String args[]){
         A obj = new <\/span>A();
         obj.msg<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
 Output:Hello
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n
    <\/p>\n
\u5177\u6709\u65b9\u6cd5\u8986\u76d6\u7684Java\u8bbf\u95ee\u4fee\u9970\u7b26<\/h3>\n
\n    \u5982\u679c\u8981\u8986\u76d6\u4efb\u4f55\u65b9\u6cd5\uff0c\u5219\u8986\u76d6\u65b9\u6cd5(\u5373\u5728\u5b50\u7c7b\u4e2d\u58f0\u660e\u7684\u65b9\u6cd5) )\u7684\u9650\u5236\u4e0d\u5f97\u66f4\u591a\u3002\n  <\/div>\n
\n
 class <\/span>A{
     protected void <\/span>msg(){
         System.out.println<\/span>(\"Hello java\"<\/span><\/span>);
     }
 }
 public <\/span>class <\/span>Simple extends <\/span>A{
     void msg(){
         System.out.println<\/span>(\"Hello java\");
     }
     \/\/C.T.Error public <\/span>static void <\/span>main<\/span>(String args[]){
         Simple obj=new Simple();
         obj.msg<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    \u9ed8\u8ba4\u4fee\u9970\u7b26\u7684\u9650\u5236\u6bd4\u53d7\u4fdd\u62a4\u7684\u9650\u5236\u66f4\u5927\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5b58\u5728\u7f16\u8bd1\u65f6\u9519\u8bef\u3002\n  <\/div>\n
 <\/body>
\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Java \u8bbf\u95ee\u4fee\u9970\u7b26zh-cn","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[111],"tags":[],"class_list":["post-727","post","type-post","status-publish","format-standard","hentry","category-java-jichu"],"_links":{"self":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/727"}],"collection":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/comments?post=727"}],"version-history":[{"count":0,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/727\/revisions"}],"wp:attachment":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/media?parent=727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/categories?post=727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/tags?post=727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}