javaSE-内部类

目录

• 成员内部类
• 静态内部类
• 局部内部类
• 匿名内部类

成员内部类

public class InnerTest {     class Inner{      } }  public class Main {     public static void main(String[] args) {         InnerTest innerTest = new InnerTest();         InnerTest.Inner inner = innerTest.new Inner();     } } 

静态内部类

public class InnerTest {     static class Inner{      } }  public class Main {     public static void main(String[] args) {         InnerTest.Inner inner = new InnerTest.Inner();     } }  

局部内部类

//和局部变量一样  public class Main {     public static void main(String[] args) {         class Inner{             public void a()             {                 System.out.println(a);             }         }          Inner inner = new Inner();         inner.a();     } } 

匿名内部类

public abstract class A {     public abstract void a(); }  public class Main {     public static void main(String[] args) {         A a = new A() {             @Override             public void a() {              }         };     } }