public class A
{
  private int x;				// instance variable of A
  private static int z = 10;			// static variable in A

  public A()					// A's constructor
  {
     x= 10;

     B.showStatic();

     B b = new B();			// build object of type B
     b.show();				// call B's show function 
  }
   
  public void show()				// instance method of A
  {
     System.out.println("x = " + x);
     System.out.println("z = " + z);
     System.out.println();     
  }

  /* THIS IS A STATIC NESTED CLASS */
  public static class B				// nested class (static)
  {
     private int y;				// instance variable of B
     private static int s = 15;	

     public B()					// constructor for B
     {
        y = 20;
	z = 5;				// has access to static 
					//  variable of class A

      x = 10;		// this would be ILLEGAL, because x is an
			//  instance variable of class A
     }

     public void show() 
     {
        System.out.println("y = " + y);
        System.out.println("z = " + z);
     }

     public static void showStatic()
     {
         System.out.println("s = " + s);
     }

  }						// end of nested class
}