5例子4.txt

Java大学实用教程 耿祥义编著 课件 PPT

class A
{
     protected  double x=10,y=12.56;
     public void speak()
     {
         System.out.println("我喜欢NBA");
     }
     public void cry()
     { 
         y=x+y;   
         System.out.printf("y=%f\n",y);
     }
}
class B extends A
{
     int y=100,z;
     public void speak()
     {
         z=2*y;
         System.out.println("I love This Game");
         System.out.printf("y=%d,z=%d",y,z);
     } 
}
class Example
{    
     public static void main(String args[ ])
     {
         B b=new B();
           b.cry()  ;
           b.speak();
     }  
}