hw9_9.java

JAVA 2面向对象程序设计(习题参考答案9-17).rar

//9-09
class Caaa
{
   public int num1,num2;
   void display()
   {
      System.out.println("print from Caaa class");
   }
}

class Cbbb extends Caaa
{
   void set_num(int a,int b)
   {
      num1=a;
      num2=b;
   }
   void show()
   {
      System.out.println("num1="+num1+" ,num2="+num2);
   }
   void display()
   {
      System.out.println("print from Cbbb class");
   }
}

class hw9_9
{
   public static void main(String args[])
   {
      Caaa aa=new Caaa();
      Cbbb bb=new Cbbb();
      aa.display();
      bb.display();
   }

}