{"id":134525,"date":"2024-04-28T11:57:29","date_gmt":"2024-04-28T03:57:29","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/134525.html"},"modified":"2024-04-28T11:57:30","modified_gmt":"2024-04-28T03:57:30","slug":"java%e7%b1%bb%e6%80%8e%e4%b9%88%e5%88%9b%e5%bb%ba","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/134525.html","title":{"rendered":"java\u7c7b\u600e\u4e48\u521b\u5efa"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24132327\/7bf87656-38af-48c2-b9f6-e748eb17d49c.webp\" alt=\"java\u7c7b\u600e\u4e48\u521b\u5efa\" \/><\/p>\n<p><p>Java\u7c7b\u7684\u521b\u5efa\u9075\u5faa\u4e00\u5b9a\u7684\u8bed\u6cd5\u89c4\u5219\u3002\u4e00\u4e2a\u57fa\u672c\u7684Java\u7c7b\u9700\u8981\u5305\u542b\u7c7b\u540d\u79f0\u3001\u7c7b\u4f53\uff0c\u5e76\u4e14\u901a\u5e38\u4f1a\u5305\u542b\u53d8\u91cf\u548c\u65b9\u6cd5\u3002<strong>\u7c7b\u540d\u79f0\u5e94\u8be5\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\uff0c\u4f7f\u7528\u9a7c\u5cf0\u5f0f\u547d\u540d\u89c4\u5219\uff0c\u800c\u7c7b\u4f53\u5219\u5305\u542b\u5728\u5927\u62ec\u53f7{}\u5185<\/strong>\u3002\u5728\u7c7b\u5185\u90e8\uff0c\u53d8\u91cf\u901a\u5e38\u88ab\u79f0\u4e3a\u5b57\u6bb5(field)\uff0c\u800c\u529f\u80fd\u5757\u5219\u79f0\u4e3a\u65b9\u6cd5(method)\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684Java\u7c7b\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u8868\u793a\u7b80\u5355\u94f6\u884c\u8d26\u6237\u7684\u7c7b\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public class BankAccount {<\/p>\n<p>    \/\/ \u5b57\u6bb5<\/p>\n<p>    private String accountNumber;<\/p>\n<p>    private double accountBalance;<\/p>\n<p>    \/\/ \u6784\u9020\u5668<\/p>\n<p>    public BankAccount(String accountNumber, double initialBalance) {<\/p>\n<p>        this.accountNumber = accountNumber;<\/p>\n<p>        this.accountBalance = initialBalance;<\/p>\n<p>    }<\/p>\n<p>    \/\/ \u65b9\u6cd5<\/p>\n<p>    public void deposit(double amount) {<\/p>\n<p>        accountBalance += amount;<\/p>\n<p>    }<\/p>\n<p>    public void withdraw(double amount) {<\/p>\n<p>        accountBalance -= amount;<\/p>\n<p>    }<\/p>\n<p>    \/\/ \u83b7\u53d6\u8d26\u6237\u4f59\u989d\u7684\u65b9\u6cd5<\/p>\n<p>    public double getBalance() {<\/p>\n<p>        return accountBalance;<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u4e2aBankAccount\u7c7b\u5b9a\u4e49\u4e86\u8d26\u6237\u7684\u5c5e\u6027\u548c\u884c\u4e3a\u3002\u5b83\u6709\u4e24\u4e2a\u5b57\u6bb5\u6765\u5b58\u50a8\u8d26\u6237\u7f16\u53f7\u548c\u4f59\u989d\uff0c\u4e00\u4e2a\u6784\u9020\u5668\u7528\u6765\u521d\u59cb\u5316\u8fd9\u4e9b\u503c\uff0c\u4ee5\u53ca\u4e09\u4e2a\u65b9\u6cd5\u7528\u4e8e\u5904\u7406\u5b58\u6b3e\u3001\u53d6\u6b3e\u548c\u67e5\u8be2\u4f59\u989d\u3002<\/p>\n<\/p>\n<hr>\n<p><h3><strong>\u4e00\u3001JAVA\u7c7b\u7684\u6982\u5ff5\u53ca\u8bed\u6cd5\u7ed3\u6784<\/strong><\/h3>\n<\/p>\n<p><p>Java\u4e2d\uff0c\u7c7b\u662f\u4e00\u4e2a\u6a21\u677f\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e00\u7ec4\u5177\u6709\u76f8\u540c\u7279\u6027\uff08\u5c5e\u6027\uff09\u548c\u884c\u4e3a\uff08\u65b9\u6cd5\uff09\u7684\u5bf9\u8c61\u3002\u4e00\u4e2a\u7c7b\u4e3b\u8981\u7531\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\u6784\u6210\uff1a<strong>\u7c7b\u540d\u3001\u5b57\u6bb5\u3001\u6784\u9020\u5668\u3001\u65b9\u6cd5<\/strong>\u3002<\/p>\n<\/p>\n<p><h4><strong>\u5b57\u6bb5\u548c\u65b9\u6cd5<\/strong><\/h4>\n<\/p>\n<p><p>\u5b57\u6bb5\u901a\u5e38\u7528\u4e8e\u8868\u793a\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u65b9\u6cd5\u5219\u5b9a\u4e49\u5bf9\u8c61\u7684\u884c\u4e3a\u3002\u5728\u5b9a\u4e49\u5b57\u6bb5\u548c\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u5176\u8bbf\u95ee\u7ea7\u522b\uff0c\u5982public\u3001private\u7b49\uff0c\u6765\u63a7\u5236\u5176\u5728\u7c7b\u5916\u90e8\u7684\u53ef\u89c1\u6027\u548c\u53ef\u8bbf\u95ee\u6027\u3002<\/p>\n<\/p>\n<p><h4><strong>\u6784\u9020\u5668<\/strong><\/h4>\n<\/p>\n<p><p>\u6784\u9020\u5668\u7528\u4e8e\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\u3002\u6784\u9020\u5668\u7684\u540d\u79f0\u4e0e\u7c7b\u540d\u76f8\u540c\uff0c\u5e76\u4e14\u4e0d\u5177\u5907\u8fd4\u56de\u7c7b\u578b\u3002\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u6709\u591a\u4e2a\u6784\u9020\u5668\uff0c\u53ea\u8981\u5b83\u4eec\u7684\u53c2\u6570\u5217\u8868\u4e0d\u540c\uff08\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u4eec\u88ab\u91cd\u8f7d\uff09\u3002<\/p>\n<\/p>\n<hr>\n<p><h3><strong>\u4e8c\u3001\u521b\u5efa\u548c\u4f7f\u7528Java\u7c7b<\/strong><\/h3>\n<\/p>\n<p><p>\u5728\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u3002\u4e00\u4e2a\u7c7b\u901a\u5e38\u4fdd\u5b58\u5728\u4e00\u4e2a\u4e0e\u7c7b\u540d\u76f8\u540c\u7684.java\u6587\u4ef6\u4e2d\u3002<\/p>\n<\/p>\n<p><h4><strong>\u5b9a\u4e49\u4e00\u4e2aJava\u7c7b<\/strong><\/h4>\n<\/p>\n<p><p>\u5b9a\u4e49\u4e00\u4e2aJava\u7c7b\u9700\u8981\u5173\u952e\u5b57<code>class<\/code>\uff0c\u540e\u9762\u8ddf\u7740\u7c7b\u540d\u548c\u7c7b\u4f53\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public class MyClass {<\/p>\n<p>    \/\/ \u7c7b\u4f53\u5305\u542b\u5b57\u6bb5\u3001\u6784\u9020\u5668\u3001\u65b9\u6cd5\u7b49\u5b9a\u4e49<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4><strong>\u5b9e\u4f8b\u5316\u4e00\u4e2a\u5bf9\u8c61<\/strong><\/h4>\n<\/p>\n<p><p>\u8981\u4f7f\u7528\u5b9a\u4e49\u597d\u7684\u7c7b\uff0c\u4f60\u9700\u8981\u521b\u5efa\u5b83\u7684\u5b9e\u4f8b\uff0c\u8fd9\u901a\u5e38\u901a\u8fc7\u5173\u952e\u5b57<code>new<\/code>\u548c\u6784\u9020\u5668\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">MyClass myObject = new MyClass();<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\uff0c<code>new<\/code>\u5173\u952e\u5b57\u4f1a\u8c03\u7528\u6784\u9020\u5668\u6765\u521d\u59cb\u5316\u65b0\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<hr>\n<p><h3><strong>\u4e09\u3001\u8bbf\u95ee\u63a7\u5236\u548c\u5c01\u88c5<\/strong><\/h3>\n<\/p>\n<p><p>\u5728Java\u4e2d\uff0c\u5c01\u88c5\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u539f\u5219\uff0c\u5b83\u610f\u5473\u7740\u5c06\u5bf9\u8c61\u7684\u72b6\u6001\u548c\u884c\u4e3a\u5305\u88c5\u5728\u4e00\u8d77\uff0c\u5e76\u4e14\u5bf9\u5916\u9690\u85cf\u5b9e\u73b0\u7ec6\u8282\u3002<\/p>\n<\/p>\n<p><h4><strong>\u8bbf\u95ee\u4fee\u9970\u7b26<\/strong><\/h4>\n<\/p>\n<p><p>\u5305\u62ecprivate\u3001public\u3001protected\u548c\u9ed8\u8ba4\uff08\u4e0d\u58f0\u660e\uff09\uff0c\u8fd9\u4e9b\u4fee\u9970\u7b26\u5b9a\u4e49\u4e86\u5176\u4ed6\u7c7b\u5bf9\u5b57\u6bb5\u548c\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u3002<\/p>\n<\/p>\n<p><h4><strong>Getter\u548cSetter\u65b9\u6cd5<\/strong><\/h4>\n<\/p>\n<p><p>\u901a\u8fc7\u516c\u6709\u7684getter\u548csetter\u65b9\u6cd5\u53ef\u4ee5\u8bbf\u95ee\u53ca\u4fee\u6539\u79c1\u6709\u5b57\u6bb5\u7684\u503c\uff0c\u8fd9\u4e5f\u662f\u5c01\u88c5\u7684\u4e00\u79cd\u4f53\u73b0\u3002<\/p>\n<\/p>\n<hr>\n<p><h3><strong>\u56db\u3001\u7c7b\u7684\u6784\u9020\u5668<\/strong><\/h3>\n<\/p>\n<p><p>\u6784\u9020\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u65b9\u6cd5\uff0c\u5b83\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u88ab\u81ea\u52a8\u8c03\u7528\u3002\u6784\u9020\u5668\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u8fdb\u884c\u5bf9\u8c61\u521d\u59cb\u5316\u3002<\/p>\n<\/p>\n<p><h4><strong>\u65e0\u53c2\u6784\u9020\u5668<\/strong><\/h4>\n<\/p>\n<p><p>\u82e5\u672a\u663e\u5f0f\u5b9a\u4e49\u4efb\u4f55\u6784\u9020\u5668\uff0cJava\u7f16\u8bd1\u5668\u4f1a\u9ed8\u8ba4\u63d0\u4f9b\u4e00\u4e2a\u65e0\u53c2\u6784\u9020\u5668\u3002\u5982\u679c\u5b9a\u4e49\u4e86\u5176\u4ed6\u6784\u9020\u5668\uff0c\u5219\u9ed8\u8ba4\u6784\u9020\u5668\u4e0d\u518d\u63d0\u4f9b\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public class MyClass {<\/p>\n<p>    public MyClass() {<\/p>\n<p>        \/\/ \u6784\u9020\u5668\u4f53<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4><strong>\u6709\u53c2\u6784\u9020\u5668<\/strong><\/h4>\n<\/p>\n<p><p>\u521b\u5efa\u6709\u53c2\u6784\u9020\u5668\u53ef\u4ee5\u5728\u5b9e\u4f8b\u5316\u5bf9\u8c61\u65f6\u7acb\u5373\u7ed9\u5bf9\u8c61\u7684\u5b57\u6bb5\u8d4b\u503c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public class MyClass {<\/p>\n<p>    private String myField;<\/p>\n<p>    public MyClass(String myField) {<\/p>\n<p>        this.myField = myField;<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<hr>\n<p><h3><strong>\u4e94\u3001\u65b9\u6cd5\u7684\u5b9a\u4e49\u4e0e\u4f7f\u7528<\/strong><\/h3>\n<\/p>\n<p><p>\u65b9\u6cd5\u662f\u7c7b\u4e2d\u5b9a\u4e49\u7684\u4e00\u6bb5\u5e26\u6709\u7279\u5b9a\u529f\u80fd\u7684\u4ee3\u7801\uff0c\u53ef\u4ee5\u88ab\u91cd\u590d\u8c03\u7528\u3002<\/p>\n<\/p>\n<p><h4><strong>\u65b9\u6cd5\u7684\u5b9a\u4e49<\/strong><\/h4>\n<\/p>\n<p><p>\u5b9a\u4e49\u65b9\u6cd5\u9700\u8981\u6307\u5b9a\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u3001\u65b9\u6cd5\u540d\u548c\u53c2\u6570\u5217\u8868\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public class MyClass {<\/p>\n<p>    public void myMethod(int parameter) {<\/p>\n<p>        \/\/ \u65b9\u6cd5\u4f53<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4><strong>\u65b9\u6cd5\u7684\u8c03\u7528<\/strong><\/h4>\n<\/p>\n<p><p>\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\u4e4b\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u5b9e\u4f8b\u6765\u8c03\u7528\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">MyClass myObject = new MyClass();<\/p>\n<p>myObject.myMethod(10);<\/p>\n<p><\/code><\/pre>\n<\/p>\n<hr>\n<p><h3><strong>\u516d\u3001\u7406\u89e3\u7c7b\u7684\u7ee7\u627f<\/strong><\/h3>\n<\/p>\n<p><p>\u7ee7\u627f\u662fJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u53e6\u4e00\u4e2a\u57fa\u672c\u6982\u5ff5\uff0c\u5b83\u8ba9\u6211\u4eec\u53ef\u4ee5\u57fa\u4e8e\u4e00\u4e2a\u73b0\u6709\u7684\u7c7b\u6765\u521b\u5efa\u4e00\u4e2a\u65b0\u7c7b\uff0c\u7ee7\u627f\u5b83\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><h4><strong>\u57fa\u7c7b\u548c\u6d3e\u751f\u7c7b<\/strong><\/h4>\n<\/p>\n<p><p>\u5b58\u5728\u7ee7\u627f\u5173\u7cfb\u7684\u4e24\u4e2a\u7c7b\uff0c\u4e00\u4e2a\u662f\u57fa\u7c7b\uff08\u7236\u7c7b\u6216\u8d85\u7c7b\uff09\uff0c\u53e6\u4e00\u4e2a\u662f\u6d3e\u751f\u7c7b\uff08\u5b50\u7c7b\uff09\u3002\u6d3e\u751f\u7c7b\u7ee7\u627f\u57fa\u7c7b\u7684\u7279\u6027\uff0c\u5e76\u53ef\u4ee5\u589e\u52a0\u65b0\u7684\u7279\u6027\u6216\u8986\u76d6\u57fa\u7c7b\u4e2d\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><h4><strong>\u4f7f\u7528\u7ee7\u627f<\/strong><\/h4>\n<\/p>\n<p><p>\u5728Java\u4e2d\uff0c\u4f7f\u7528\u5173\u952e\u5b57<code>extends<\/code>\u6765\u5efa\u7acb\u7ee7\u627f\u5173\u7cfb\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public class MyBase {<\/p>\n<p>    public void baseMethod() {<\/p>\n<p>        \/\/ \u57fa\u7c7b\u65b9\u6cd5<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p>public class MyDerived extends MyBase {<\/p>\n<p>    public void derivedMethod() {<\/p>\n<p>        \/\/ \u6d3e\u751f\u7c7b\u65b9\u6cd5<\/p>\n<p>    }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<hr>\n<p><h3><strong>\u4e03\u3001\u6df1\u5165\u7406\u89e3\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3<\/strong><\/h3>\n<\/p>\n<p><p>\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u662fJava\u4e2d\u4e24\u4e2a\u7528\u4e8e\u5b9e\u73b0\u62bd\u8c61\u5c42\u7684\u673a\u5236\u3002<\/p>\n<\/p>\n<p><h4><strong>\u62bd\u8c61\u7c7b<\/strong><\/h4>\n<\/p>\n<p><p>\u62bd\u8c61\u7c7b\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\uff0c\u901a\u5e38\u7528\u4f5c\u5176\u4ed6\u7c7b\u7684\u57fa\u7c7b\u3002\u62bd\u8c61\u7c7b\u4e2d\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff08\u6ca1\u6709\u5177\u4f53\u5b9e\u73b0\u7684\u65b9\u6cd5\uff09\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public abstract class MyAbstractClass {<\/p>\n<p>    public abstract void myAbstractMethod();<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4><strong>\u63a5\u53e3<\/strong><\/h4>\n<\/p>\n<p><p>\u63a5\u53e3\u662f\u4e00\u79cd\u5b8c\u5168\u62bd\u8c61\u7684\u7c7b\uff0c\u5b83\u53ea\u80fd\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u548c\u5e38\u91cf\u3002\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u9ed8\u8ba4\u662fpublic\u548cabstract\u7684\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">public interface MyInterface {<\/p>\n<p>    void myInterfaceMethod();<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u900f\u8fc7\u5b9e\u73b0\uff08\u5b9e\u8df5\uff09\u63a5\u53e3\u6216\u7ee7\u627f\u62bd\u8c61\u7c7b\uff0cJava\u4e2d\u7684\u7c7b\u53ef\u4ee5\u83b7\u5f97\u66f4\u591a\u7684\u591a\u6001\u6027\u548c\u53ef\u590d\u7528\u6027\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>Q1: \u5982\u4f55\u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u7c7b\uff1f<\/strong><\/p>\n<p>A1: \u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u7c7b\u9700\u8981\u4f7f\u7528\u5173\u952e\u5b57&quot;class&quot;\u540e\u8ddf\u7c7b\u7684\u540d\u79f0\uff0c\u5e76\u5728\u82b1\u62ec\u53f7\u5185\u5b9a\u4e49\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a<code>public class MyClass { \/\/\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5 }<\/code>\u3002<\/p>\n<p><strong>Q2: \u521b\u5efa\u7c7b\u65f6\u9700\u8981\u6ce8\u610f\u54ea\u4e9b\u4e8b\u9879\uff1f<\/strong><\/p>\n<p>A2: \u521b\u5efa\u7c7b\u65f6\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>\u7c7b\u7684\u540d\u79f0\u5e94\u8be5\u4ee5\u5927\u5199\u5b57\u6bcd\u5f00\u5934\uff0c\u9075\u5faa\u9a7c\u5cf0\u547d\u540d\u6cd5\uff0c\u4f8b\u5982<code>public class MyClassName<\/code>\u3002<\/li>\n<li>\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5e94\u8be5\u5b9a\u4e49\u5728\u7c7b\u7684\u82b1\u62ec\u53f7\u5185\u90e8\u3002<\/li>\n<li>\u7c7b\u53ef\u4ee5\u5305\u542b\u6784\u9020\u65b9\u6cd5\u3001\u5b9e\u4f8b\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u3002<\/li>\n<li>\u7c7b\u53ef\u4ee5\u7ee7\u627f\u5176\u4ed6\u7c7b\uff0c\u4f7f\u7528\u5173\u952e\u5b57&quot;extends&quot;\uff0c\u4f8b\u5982\uff1a<code>public class SubClass extends SuperClass<\/code>\u3002<\/li>\n<\/ul>\n<p><strong>Q3: \u5982\u4f55\u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u5e26\u6709\u6784\u9020\u65b9\u6cd5\u7684\u7c7b\uff1f<\/strong><\/p>\n<p>A3: \u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u5e26\u6709\u6784\u9020\u65b9\u6cd5\u7684\u7c7b\u9700\u8981\u5728\u7c7b\u7684\u5185\u90e8\u5b9a\u4e49\u4e00\u4e2a\u4e0e\u7c7b\u540d\u79f0\u76f8\u540c\u7684\u65b9\u6cd5\uff0c\u5e76\u4e14\u6ca1\u6709\u8fd4\u56de\u7c7b\u578b\u3002\u6784\u9020\u65b9\u6cd5\u7528\u4e8e\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5e76\u53ef\u4ee5\u5728\u5176\u4e2d\u521d\u59cb\u5316\u7c7b\u7684\u5c5e\u6027\u3002\u4f8b\u5982\uff1a<code>public class MyClass { public MyClass() { \/\/\u6784\u9020\u65b9\u6cd5\u7684\u4ee3\u7801 } }<\/code>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Java\u7c7b\u7684\u521b\u5efa\u9075\u5faa\u4e00\u5b9a\u7684\u8bed\u6cd5\u89c4\u5219\u3002\u4e00\u4e2a\u57fa\u672c\u7684Java\u7c7b\u9700\u8981\u5305\u542b\u7c7b\u540d\u79f0\u3001\u7c7b\u4f53\uff0c\u5e76\u4e14\u901a\u5e38\u4f1a\u5305\u542b\u53d8\u91cf\u548c\u65b9\u6cd5\u3002\u7c7b\u540d\u79f0 [&hellip;]","protected":false},"author":3,"featured_media":134528,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/134525"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=134525"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/134525\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/134528"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=134525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=134525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=134525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}