{"id":73,"date":"2015-03-30T10:51:49","date_gmt":"2015-03-30T02:51:49","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=73"},"modified":"2015-04-18T21:16:39","modified_gmt":"2015-04-18T13:16:39","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":"

Java \u901a\u8fc7\u4fee\u9970\u7b26\u6765\u63a7\u5236\u7c7b\u3001\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u548c\u5176\u4ed6\u529f\u80fd\uff0c\u901a\u5e38\u653e\u5728\u8bed\u53e5\u7684\u6700\u524d\u7aef\u3002\u4f8b\u5982\uff1a
\n[java]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}[\/java]<\/p>\n

<\/p>\n

Java \u7684\u4fee\u9970\u7b26\u5f88\u591a\uff0c\u5206\u4e3a\u8bbf\u95ee\u4fee\u9970\u7b26\u548c\u975e\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\u672c\u8282\u4ec5\u4ecb\u7ecd\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u975e\u8bbf\u95ee\u4fee\u9970\u7b26\u4f1a\u5728\u540e\u7eed\u4ecb\u7ecd\u3002<\/p>\n

\u8bbf\u95ee\u4fee\u9970\u7b26\u4e5f\u53eb\u8bbf\u95ee\u63a7\u5236\u7b26\uff0c\u662f\u6307\u80fd\u591f\u63a7\u5236\u7c7b\u3001\u6210\u5458\u53d8\u91cf\u3001\u65b9\u6cd5\u7684\u4f7f\u7528\u6743\u9650\u7684\u5173\u952e\u5b57\u3002<\/p>\n

\u5728\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\uff0c\u8bbf\u95ee\u63a7\u5236\u7b26\u662f\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u4fdd\u62a4\u5bf9\u7c7b\u3001\u53d8\u91cf\u3001\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\u7684\u8bbf\u95ee\u3002<\/p>\n

Java\u652f\u6301\u56db\u79cd\u4e0d\u540c\u7684\u8bbf\u95ee\u6743\u9650\uff1a
\n\"c\"<\/a><\/p>\n

public\uff1a\u516c\u6709\u7684
\n\u88ab\u58f0\u660e\u4e3apublic\u7684\u7c7b\u3001\u65b9\u6cd5\u3001\u6784\u9020\u65b9\u6cd5\u548c\u63a5\u53e3\u80fd\u591f\u88ab\u4efb\u4f55\u5176\u4ed6\u7c7b\u8bbf\u95ee\u3002<\/p>\n

\u5982\u679c\u51e0\u4e2a\u76f8\u4e92\u8bbf\u95ee\u7684public\u7c7b\u5206\u5e03\u5728\u4e0d\u7528\u7684\u5305\u4e2d\uff0c\u5219\u9700\u8981\u5bfc\u5165\u76f8\u5e94public\u7c7b\u6240\u5728\u7684\u5305\u3002\u7531\u4e8e\u7c7b\u7684\u7ee7\u627f\u6027\uff0c\u7c7b\u6240\u6709\u7684\u516c\u6709\u65b9\u6cd5\u548c\u53d8\u91cf\u90fd\u80fd\u88ab\u5176\u5b50\u7c7b\u7ee7\u627f\u3002<\/p>\n

\u4e0b\u9762\u7684\u65b9\u6cd5\u4f7f\u7528\u4e86\u516c\u6709\u8bbf\u95ee\u63a7\u5236\uff1a
\npublic static void main(String[] arguments) {
\n\/\/ body of method
\n}
\nJava\u7a0b\u5e8f\u7684main() \u65b9\u6cd5\u5fc5\u987b\u8bbe\u7f6e\u6210\u516c\u6709\u7684\uff0c\u5426\u5219\uff0cJava\u89e3\u91ca\u5668\u5c06\u4e0d\u80fd\u8fd0\u884c\u8be5\u7c7b\u3002<\/p>\n

protected\uff1a\u53d7\u4fdd\u62a4\u7684
\n\u88ab\u58f0\u660e\u4e3aprotected\u7684\u53d8\u91cf\u3001\u65b9\u6cd5\u548c\u6784\u9020\u65b9\u6cd5\u80fd\u88ab\u540c\u4e00\u4e2a\u5305\u4e2d\u7684\u4efb\u4f55\u5176\u4ed6\u7c7b\u8bbf\u95ee\uff0c\u4e5f\u80fd\u591f\u88ab\u4e0d\u540c\u5305\u4e2d\u7684\u5b50\u7c7b\u8bbf\u95ee\u3002<\/p>\n

protected\u8bbf\u95ee\u4fee\u9970\u7b26\u4e0d\u80fd\u4fee\u9970\u7c7b\u548c\u63a5\u53e3\uff0c\u65b9\u6cd5\u548c\u6210\u5458\u53d8\u91cf\u80fd\u591f\u58f0\u660e\u4e3aprotected\uff0c\u4f46\u662f\u63a5\u53e3\u7684\u6210\u5458\u53d8\u91cf\u548c\u6210\u5458\u65b9\u6cd5\u4e0d\u80fd\u58f0\u660e\u4e3aprotected\u3002<\/p>\n

\u5b50\u7c7b\u80fd\u8bbf\u95eeprotected\u4fee\u9970\u7b26\u58f0\u660e\u7684\u65b9\u6cd5\u548c\u53d8\u91cf\uff0c\u8fd9\u6837\u5c31\u80fd\u4fdd\u62a4\u4e0d\u76f8\u5173\u7684\u7c7b\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u548c\u53d8\u91cf\u3002<\/p>\n

\u4e0b\u9762\u7684\u7236\u7c7b\u4f7f\u7528\u4e86protected\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u5b50\u7c7b\u91cd\u8f7d\u4e86\u7236\u7c7b\u7684bark()\u65b9\u6cd5\u3002
\n[java]public class Dog{
\n\u00a0\u00a0\u00a0 protected void bark() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u6c6a\u6c6a\uff0c\u4e0d\u8981\u8fc7\u6765");
\n\u00a0\u00a0\u00a0 }
\n}
\nclass Teddy extends Dog{ \/\/ \u6cf0\u8fea
\n\u00a0\u00a0\u00a0 void bark() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u6c6a\u6c6a\uff0c\u6211\u597d\u6015\uff0c\u4e0d\u8981\u8ddf\u7740\u6211");
\n\u00a0\u00a0\u00a0 }
\n}[\/java]<\/p>\n

\u5982\u679c\u628abark()\u65b9\u6cd5\u58f0\u660e\u4e3aprivate\uff0c\u90a3\u4e48\u9664\u4e86Dog\u4e4b\u5916\u7684\u7c7b\u5c06\u4e0d\u80fd\u8bbf\u95ee\u8be5\u65b9\u6cd5\u3002\u5982\u679c\u628abark()\u58f0\u660e\u4e3apublic\uff0c\u90a3\u4e48\u6240\u6709\u7684\u7c7b\u90fd\u80fd\u591f\u8bbf\u95ee\u8be5\u65b9\u6cd5\u3002\u5982\u679c\u6211\u4eec\u53ea\u60f3\u8ba9\u8be5\u65b9\u6cd5\u5bf9\u5176\u6240\u5728\u7c7b\u7684\u5b50\u7c7b\u53ef\u89c1\uff0c\u5219\u5c06\u8be5\u65b9\u6cd5\u58f0\u660e\u4e3aprotected\u3002<\/p>\n

private\uff1a\u79c1\u6709\u7684
\n\u79c1\u6709\u8bbf\u95ee\u4fee\u9970\u7b26\u662f\u6700\u4e25\u683c\u7684\u8bbf\u95ee\u7ea7\u522b\uff0c\u6240\u4ee5\u88ab\u58f0\u660e\u4e3aprivate\u7684\u65b9\u6cd5\u3001\u53d8\u91cf\u548c\u6784\u9020\u65b9\u6cd5\u53ea\u80fd\u88ab\u6240\u5c5e\u7c7b\u8bbf\u95ee\uff0c\u5e76\u4e14\u7c7b\u548c\u63a5\u53e3\u4e0d\u80fd\u58f0\u660e\u4e3aprivate\u3002<\/p>\n

\u58f0\u660e\u4e3a\u79c1\u6709\u8bbf\u95ee\u7c7b\u578b\u7684\u53d8\u91cf\u53ea\u80fd\u901a\u8fc7\u7c7b\u4e2d\u516c\u5171\u7684Getter\/Setter\u65b9\u6cd5\u88ab\u5916\u90e8\u7c7b\u8bbf\u95ee\u3002<\/p>\n

private\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u4f7f\u7528\u4e3b\u8981\u7528\u6765\u9690\u85cf\u7c7b\u7684\u5b9e\u73b0\u7ec6\u8282\u548c\u4fdd\u62a4\u7c7b\u7684\u6570\u636e\u3002<\/p>\n

\u4e0b\u9762\u7684\u7c7b\u4f7f\u7528\u4e86\u79c1\u6709\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a
\n[java]public class Dog{
\n\u00a0\u00a0\u00a0 private String name;
\n\u00a0\u00a0\u00a0 private int age;
\n\u00a0\u00a0\u00a0 public String getName() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return name;
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public void setName(String name) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 this.name = name;
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public int getAge() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return age;
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public void setAge(int age) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 this.age = age;
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n\u4f8b\u5b50\u4e2d\uff0cDog\u7c7b\u4e2d\u7684name\u3001age\u53d8\u91cf\u4e3a\u79c1\u6709\u53d8\u91cf\uff0c\u6240\u4ee5\u5176\u4ed6\u7c7b\u4e0d\u80fd\u76f4\u63a5\u5f97\u5230\u548c\u8bbe\u7f6e\u8be5\u53d8\u91cf\u7684\u503c\u3002\u4e3a\u4e86\u4f7f\u5176\u4ed6\u7c7b\u80fd\u591f\u64cd\u4f5c\u8be5\u53d8\u91cf\uff0c\u5b9a\u4e49\u4e86\u4e24\u5bf9public\u65b9\u6cd5\uff0cgetName()\/setName() \u548c getAge()\/setAge()\uff0c\u5b83\u4eec\u7528\u6765\u83b7\u53d6\u548c\u8bbe\u7f6e\u79c1\u6709\u53d8\u91cf\u7684\u503c\u3002<\/p>\n

this \u662fJava\u4e2d\u7684\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u672c\u7ae0\u4f1a\u8bb2\u5230\uff0c\u4f60\u53ef\u4ee5\u70b9\u51fb Java this\u5173\u952e\u5b57\u8be6\u89e3 \u9884\u89c8\u3002<\/p>\n

\u5728\u7c7b\u4e2d\u5b9a\u4e49\u8bbf\u95ee\u79c1\u6709\u53d8\u91cf\u7684\u65b9\u6cd5\uff0c\u4e60\u60ef\u4e0a\u662f\u8fd9\u6837\u547d\u540d\u7684\uff1a\u5728\u53d8\u91cf\u540d\u79f0\u524d\u9762\u52a0\u201cget\u201d\u6216\u201cset\u201d\uff0c\u5e76\u5c06\u53d8\u91cf\u7684\u9996\u5b57\u6bcd\u5927\u5199\u3002\u4f8b\u5982\uff0c\u83b7\u53d6\u79c1\u6709\u53d8\u91cf name \u7684\u65b9\u6cd5\u4e3a getName()\uff0c\u8bbe\u7f6e name \u7684\u65b9\u6cd5\u4e3a setName()\u3002\u8fd9\u4e9b\u65b9\u6cd5\u7ecf\u5e38\u4f7f\u7528\uff0c\u4e5f\u6709\u4e86\u7279\u5b9a\u7684\u79f0\u547c\uff0c\u79f0\u4e3a Getter \u548c Setter \u65b9\u6cd5\u3002
\n\u9ed8\u8ba4\u7684\uff1a\u4e0d\u4f7f\u7528\u4efb\u4f55\u5173\u952e\u5b57<\/p>\n

\u4e0d\u4f7f\u7528\u4efb\u4f55\u4fee\u9970\u7b26\u58f0\u660e\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5bf9\u540c\u4e00\u4e2a\u5305\u5185\u7684\u7c7b\u662f\u53ef\u89c1\u7684\u3002\u63a5\u53e3\u91cc\u7684\u53d8\u91cf\u90fd\u9690\u5f0f\u58f0\u660e\u4e3apublic static final\uff0c\u800c\u63a5\u53e3\u91cc\u7684\u65b9\u6cd5\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u8bbf\u95ee\u6743\u9650\u4e3apublic\u3002<\/p>\n

\u5982\u4e0b\u4f8b\u6240\u793a\uff0c\u7c7b\u3001\u53d8\u91cf\u548c\u65b9\u6cd5\u7684\u5b9a\u4e49\u6ca1\u6709\u4f7f\u7528\u4efb\u4f55\u4fee\u9970\u7b26\uff1a
\n[java]class Dog{
\n\u00a0\u00a0\u00a0 String name;
\n\u00a0\u00a0\u00a0 int age;
\n\u00a0\u00a0
\n\u00a0\u00a0\u00a0 void bark(){ \/\/ \u6c6a\u6c6a\u53eb
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u6c6a\u6c6a\uff0c\u4e0d\u8981\u8fc7\u6765");
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 void hungry(){ \/\/ \u9965\u997f
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("\u4e3b\u4eba\uff0c\u6211\u997f\u4e86");
\n\u00a0\u00a0\u00a0 }
\n}[\/java]<\/p>\n

\u8bbf\u95ee\u63a7\u5236\u548c\u7ee7\u627f<\/p>\n

\u8bf7\u6ce8\u610f\u4ee5\u4e0b\u65b9\u6cd5\u7ee7\u627f\uff08\u4e0d\u4e86\u89e3\u7ee7\u627f\u6982\u5ff5\u7684\u8bfb\u8005\u53ef\u4ee5\u8df3\u8fc7\u8fd9\u91cc\uff0c\u6216\u8005\u70b9\u51fb Java\u7ee7\u627f\u548c\u591a\u6001 \u9884\u89c8\uff09\u7684\u89c4\u5219\uff1a
\n\u7236\u7c7b\u4e2d\u58f0\u660e\u4e3apublic\u7684\u65b9\u6cd5\u5728\u5b50\u7c7b\u4e2d\u4e5f\u5fc5\u987b\u4e3apublic\u3002
\n\u7236\u7c7b\u4e2d\u58f0\u660e\u4e3aprotected\u7684\u65b9\u6cd5\u5728\u5b50\u7c7b\u4e2d\u8981\u4e48\u58f0\u660e\u4e3aprotected\uff0c\u8981\u4e48\u58f0\u660e\u4e3apublic\u3002\u4e0d\u80fd\u58f0\u660e\u4e3aprivate\u3002
\n\u7236\u7c7b\u4e2d\u9ed8\u8ba4\u4fee\u9970\u7b26\u58f0\u660e\u7684\u65b9\u6cd5\uff0c\u80fd\u591f\u5728\u5b50\u7c7b\u4e2d\u58f0\u660e\u4e3aprivate\u3002
\n\u7236\u7c7b\u4e2d\u58f0\u660e\u4e3aprivate\u7684\u65b9\u6cd5\uff0c\u4e0d\u80fd\u591f\u88ab\u7ee7\u627f\u3002
\n\u5982\u4f55\u4f7f\u7528\u8bbf\u95ee\u63a7\u5236\u7b26<\/p>\n

\u8bbf\u95ee\u63a7\u5236\u7b26\u53ef\u4ee5\u8ba9\u6211\u4eec\u5f88\u65b9\u4fbf\u7684\u63a7\u5236\u4ee3\u7801\u7684\u6743\u9650\uff1a
\n\u5f53\u9700\u8981\u8ba9\u81ea\u5df1\u7f16\u5199\u7684\u7c7b\u88ab\u6240\u6709\u7684\u5176\u4ed6\u7c7b\u8bbf\u95ee\u65f6\uff0c\u5c31\u53ef\u4ee5\u5c06\u7c7b\u7684\u8bbf\u95ee\u63a7\u5236\u7b26\u58f0\u660e\u4e3a public\u3002
\n\u5f53\u9700\u8981\u8ba9\u81ea\u5df1\u7684\u7c7b\u53ea\u80fd\u88ab\u81ea\u5df1\u7684\u5305\u4e2d\u7684\u7c7b\u8bbf\u95ee\u65f6\uff0c\u5c31\u53ef\u4ee5\u7701\u7565\u8bbf\u95ee\u63a7\u5236\u7b26\u3002
\n\u5f53\u9700\u8981\u63a7\u5236\u4e00\u4e2a\u7c7b\u4e2d\u7684\u6210\u5458\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u7c7b\u4e2d\u7684\u6210\u5458\u6570\u636e\u8bbf\u95ee\u63a7\u5236\u7b26\u8bbe\u7f6e\u4e3a public\u3001protected\uff0c\u6216\u8005\u7701\u7565\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Java \u901a\u8fc7\u4fee\u9970\u7b26\u6765\u63a7\u5236\u7c7b\u3001\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u548c\u5176\u4ed6\u529f\u80fd\uff0c\u901a\u5e38\u653e\u5728\u8bed\u53e5\u7684\u6700\u524d\u7aef\u3002\u4f8b\u5982\uff1a [java]pub […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"_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}]}}