{"id":1252,"date":"2025-01-27T20:39:00","date_gmt":"2025-01-27T12:39:00","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=1252"},"modified":"2025-01-27T20:39:01","modified_gmt":"2025-01-27T12:39:01","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%ef%bc%88oop%ef%bc%89%ef%bc%9a%e7%b1%bb%e3%80%81%e5%af%b9%e8%b1%a1%e3%80%81%e7%bb%a7%e6%89%bf%e4%b8%8e","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/01\/27\/%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3java%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%ef%bc%88oop%ef%bc%89%ef%bc%9a%e7%b1%bb%e3%80%81%e5%af%b9%e8%b1%a1%e3%80%81%e7%bb%a7%e6%89%bf%e4%b8%8e\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09\uff1a\u7c7b\u3001\u5bf9\u8c61\u3001\u7ee7\u627f\u4e0e\u591a\u6001"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u5173\u4e8e<strong>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09<\/strong>\u7684\u8be6\u7ec6\u6559\u7a0b\uff0c\u6db5\u76d6\u4e86Java\u4e2d\u9762\u5411\u5bf9\u8c61\u7684\u5173\u952e\u6982\u5ff5\u548c\u5b9e\u8df5\u65b9\u6cd5\u3002\u6b64\u90e8\u5206\u5c06\u5e2e\u52a9\u4f60\u7406\u89e3\u7c7b\u548c\u5bf9\u8c61\u3001\u7ee7\u627f\u3001\u591a\u6001\u4ee5\u53ca\u63a5\u53e3\u4e0e\u62bd\u8c61\u7c7b\u7b49\u6838\u5fc3\u77e5\u8bc6\uff1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Java\u6559\u7a0b\u4e4b\uff1a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08OOP\uff09<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>1. \u7c7b\u548c\u5bf9\u8c61<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7c7b\u7684\u5b9a\u4e49<\/strong><br>\u7c7b\u662f\u521b\u5efa\u5bf9\u8c61\u7684\u84dd\u56fe\uff0c\u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u884c\u4e3a\u3002\u5728Java\u4e2d\uff0c\u7c7b\u662f\u4f7f\u7528<code>class<\/code>\u5173\u952e\u5b57\u58f0\u660e\u7684\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Car {\n      String color;\n      int speed;\n\n      public void drive() {\n          System.out.println(\"Driving the car...\");\n      }\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5bf9\u8c61\u7684\u521b\u5efa\u4e0e\u4f7f\u7528<\/strong><br>\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u901a\u8fc7<code>new<\/code>\u5173\u952e\u5b57\u521b\u5efa\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  Car myCar = new Car();\n  myCar.color = \"Red\";\n  myCar.speed = 100;\n  myCar.drive();<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6784\u9020\u51fd\u6570<\/strong><br>\u6784\u9020\u51fd\u6570\u662f\u7c7b\u7684\u7279\u6b8a\u65b9\u6cd5\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002\u82e5\u6ca1\u6709\u663e\u5f0f\u5b9a\u4e49\u6784\u9020\u51fd\u6570\uff0cJava\u4f1a\u63d0\u4f9b\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Car {\n      String color;\n      int speed;\n\n      public Car(String color, int speed) {\n          this.color = color;\n          this.speed = speed;\n      }\n  }\n  Car myCar = new Car(\"Blue\", 120);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>this\u5173\u952e\u5b57<\/strong><br><code>this<\/code>\u5173\u952e\u5b57\u6307\u4ee3\u5f53\u524d\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u7528\u4e8e\u533a\u5206\u6210\u5458\u53d8\u91cf\u548c\u53c2\u6570\u6216\u5c40\u90e8\u53d8\u91cf\u7684\u540d\u79f0\u76f8\u540c\u7684\u60c5\u51b5\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Car {\n      String color;\n      int speed;\n\n      public Car(String color, int speed) {\n          this.color = color;\n          this.speed = speed;\n      }\n  }<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. \u5c01\u88c5<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6210\u5458\u53d8\u91cf\u7684\u8bbf\u95ee\u63a7\u5236<\/strong><br>Java\u901a\u8fc7\u8bbf\u95ee\u4fee\u9970\u7b26\uff08<code>public<\/code>, <code>private<\/code>, <code>protected<\/code>\uff09\u6765\u63a7\u5236\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u7684\u8bbf\u95ee\u6743\u9650\u3002<\/li>\n\n\n\n<li><code>private<\/code>\uff1a\u53ea\u5141\u8bb8\u5728\u5f53\u524d\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li><code>protected<\/code>\uff1a\u5141\u8bb8\u5728\u540c\u5305\u5185\u6216\u5b50\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li><code>public<\/code>\uff1a\u4efb\u4f55\u5730\u65b9\u90fd\u53ef\u4ee5\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Person {\n      private String name;\n      private int age;\n\n      public String getName() {\n          return name;\n      }\n\n      public void setName(String name) {\n          this.name = name;\n      }\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>getter\u548csetter\u65b9\u6cd5<\/strong><br>\u4f7f\u7528getter\u548csetter\u65b9\u6cd5\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u5bf9\u8c61\u7684\u79c1\u6709\u5c5e\u6027\uff0c\u5c01\u88c5\u4e86\u76f4\u63a5\u8bbf\u95ee\u53d8\u91cf\u7684\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Person {\n      private String name;\n\n      public String getName() {\n          return name;\n      }\n\n      public void setName(String name) {\n          this.name = name;\n      }\n  }<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>3. \u7ee7\u627f<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>super\u5173\u952e\u5b57<\/strong><br><code>super<\/code>\u5173\u952e\u5b57\u7528\u6765\u8bbf\u95ee\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3001\u65b9\u6cd5\u548c\u5c5e\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Animal {\n      public void sound() {\n          System.out.println(\"Animal makes a sound\");\n      }\n  }\n\n  public class Dog extends Animal {\n      @Override\n      public void sound() {\n          super.sound();  \/\/ \u8c03\u7528\u7236\u7c7b\u65b9\u6cd5\n          System.out.println(\"Dog barks\");\n      }\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65b9\u6cd5\u91cd\u5199\uff08Override\uff09<\/strong><br>\u5b50\u7c7b\u53ef\u4ee5\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u63d0\u4f9b\u81ea\u5df1\u7684\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  @Override\n  public void sound() {\n      System.out.println(\"Dog barks\");\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7236\u7c7b\u6784\u9020\u51fd\u6570\u7684\u8c03\u7528<\/strong><br>\u5b50\u7c7b\u6784\u9020\u51fd\u6570\u9ed8\u8ba4\u8c03\u7528\u7236\u7c7b\u7684\u65e0\u53c2\u6784\u9020\u51fd\u6570\u3002\u82e5\u7236\u7c7b\u6ca1\u6709\u65e0\u53c2\u6784\u9020\u51fd\u6570\uff0c\u5fc5\u987b\u663e\u5f0f\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Dog extends Animal {\n      public Dog() {\n          super();  \/\/ \u663e\u5f0f\u8c03\u7528\u7236\u7c7b\u6784\u9020\u51fd\u6570\n      }\n  }<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>4. \u591a\u6001<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65b9\u6cd5\u91cd\u8f7d\uff08Overloading\uff09<\/strong><br>\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u5141\u8bb8\u591a\u4e2a\u65b9\u6cd5\u540d\u76f8\u540c\uff0c\u4f46\u53c2\u6570\u5217\u8868\u4e0d\u540c\uff08\u53c2\u6570\u4e2a\u6570\u6216\u7c7b\u578b\u4e0d\u540c\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  public class Calculator {\n      public int add(int a, int b) {\n          return a + b;\n      }\n\n      public double add(double a, double b) {\n          return a + b;\n      }\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u52a8\u6001\u65b9\u6cd5\u5206\u6d3e<\/strong><br>\u591a\u6001\u7684\u4e00\u4e2a\u91cd\u8981\u7279\u5f81\uff0c\u901a\u8fc7\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\u65f6\uff0c\u8c03\u7528\u7684\u65b9\u6cd5\u662f\u52a8\u6001\u7ed1\u5b9a\u7684\uff0c\u53d6\u51b3\u4e8e\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  Animal animal = new Dog();\n  animal.sound();  \/\/ \u4f1a\u8c03\u7528Dog\u7c7b\u4e2d\u7684sound()\u65b9\u6cd5<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>5. \u63a5\u53e3\u4e0e\u62bd\u8c61\u7c7b<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63a5\u53e3\u7684\u5b9a\u4e49\u4e0e\u5b9e\u73b0<\/strong><br>\u63a5\u53e3\u662f\u7eaf\u7cb9\u7684\u62bd\u8c61\u7c7b\uff0c\u53ea\u80fd\u5305\u542b\u65b9\u6cd5\u7684\u58f0\u660e\uff0c\u6ca1\u6709\u5b9e\u73b0\u3002\u7c7b\u901a\u8fc7<code>implements<\/code>\u5173\u952e\u5b57\u5b9e\u73b0\u63a5\u53e3\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  interface Animal {\n      void sound();\n  }\n\n  public class Dog implements Animal {\n      @Override\n      public void sound() {\n          System.out.println(\"Dog barks\");\n      }\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u62bd\u8c61\u7c7b\u7684\u5b9a\u4e49\u4e0e\u7ee7\u627f<\/strong><br>\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u548c\u5177\u4f53\u65b9\u6cd5\uff0c\u4e0d\u80fd\u5b9e\u4f8b\u5316\uff0c\u53ea\u80fd\u88ab\u7ee7\u627f\u3002\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  abstract class Animal {\n      abstract void sound();\n\n      public void eat() {\n          System.out.println(\"Eating\");\n      }\n  }\n\n  class Dog extends Animal {\n      @Override\n      void sound() {\n          System.out.println(\"Dog barks\");\n      }\n  }<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u591a\u91cd\u7ee7\u627f\u7684\u66ff\u4ee3\uff08\u63a5\u53e3\u7684\u4f7f\u7528\uff09<\/strong><br>Java\u4e0d\u652f\u6301\u7c7b\u7684\u591a\u91cd\u7ee7\u627f\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u63a5\u53e3\u5b9e\u73b0\u591a\u91cd\u7ee7\u627f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  interface A {\n      void methodA();\n  }\n\n  interface B {\n      void methodB();\n  }\n\n  class C implements A, B {\n      public void methodA() {\n          System.out.println(\"Method A\");\n      }\n\n      public void methodB() {\n          System.out.println(\"Method B\");\n      }\n  }<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>6. \u5185\u90e8\u7c7b<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9759\u6001\u5185\u90e8\u7c7b<\/strong><br>\u9759\u6001\u5185\u90e8\u7c7b\u53ef\u4ee5\u4e0d\u4f9d\u8d56\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\u6765\u521b\u5efa\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  class Outer {\n      static class Inner {\n          void show() {\n              System.out.println(\"Static inner class\");\n          }\n      }\n  }\n  Outer.Inner inner = new Outer.Inner();\n  inner.show();<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6210\u5458\u5185\u90e8\u7c7b<\/strong><br>\u6210\u5458\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u6240\u6709\u6210\u5458\uff08\u5305\u62ec\u79c1\u6709\u6210\u5458\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  class Outer {\n      private String msg = \"Hello from Outer\";\n      class Inner {\n          void display() {\n              System.out.println(msg);\n          }\n      }\n  }\n  Outer outer = new Outer();\n  Outer.Inner inner = outer.new Inner();\n  inner.display();<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u533f\u540d\u5185\u90e8\u7c7b<\/strong><br>\u533f\u540d\u5185\u90e8\u7c7b\u662f\u4e00\u79cd\u6ca1\u6709\u540d\u5b57\u7684\u5185\u90e8\u7c7b\uff0c\u5e38\u7528\u4e8e\u5b9e\u73b0\u63a5\u53e3\u6216\u7ee7\u627f\u7c7b\u65f6\uff0c\u7b80\u5316\u4ee3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  Animal animal = new Animal() {\n      @Override\n      public void sound() {\n          System.out.println(\"Anonymous animal sound\");\n      }\n  };\n  animal.sound();<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3\uff1a<\/h3>\n\n\n\n<p 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