class Outer{ 
   int x=110; 
   public void show(){ 
      System.out.println("外部类的x="+x); 
   } 
  public void showInner(){ 
      Inner inner=new Inner(); 
      inner.show(); 
      System.out.println(inner.x); 
   }  
  class Inner{//内部类 
    int x=220; 
    public void show(){ 
         System.out.println("内部类的x="+x); 
      } 
  } 
} 
 
 
 
public class OuterDemo { 
   public static void main(String[] args) { 
     Outer outer=new Outer(); 
     outer.show(); 
     outer.showInner(); 
     Outer.Inner outerInner=new Outer().new Inner();//特殊情况.外部类直接访问内部类成员变量 
     outerInner.show(); 
   } 
 
} 

class Outer{ 
   int x=110; 
   class Inner{ 
     int x=220; 
     public void show(){ 
        int x=330; 
        System.out.println("x="+x);//访问show()中的x 
        System.out.println("x="+this.x);//访问内部类的x 
        System.out.println("x="+Outer.this.x);//访问外部类的x 
 
     } 
   } 
  void showInner(){ 
     Inner inner=new Inner(); 
     inner.show(); 
  } 
} 
 
 
 
public class OuterDemo { 
    public static void main(String[] args) { 
      Outer outer=new Outer(); 
      outer.showInner(); 
     
    } 
 
} 

 package cn.com; 
class Outer { 
   int x = 110; 
   public void show() { 
      final int y=99; 
      class Inner {// 内部类 
       int x = 880; 
       public void showInner() { 
         System.out.println("局部变量y=" + y); 
        } 
      } 
   new Inner().showInner(); 
   } 
 
} 
 
public class OuterDemo { 
   public static void main(String[] args) { 
      Outer outer = new Outer(); 
      outer.show(); 
   } 
 
}