// 程序：使用super和this關(guān)鍵字
// 范例文件：UseSuperAndThis.java

class SuperClass 
{
   public SuperClass()
   {
      System.out.println("SuperClass...");
   }

   public int addNumber(int i,int j) 
   {
      return i+j;    
   }
}

class ChildClass extends SuperClass  
{
   private int i,j,k; 

   public ChildClass()
   {
      super();        
   }

   public ChildClass(int i,int j) 
   {
      this();    
      i = i;     
      j = j;     
   }

   public void addNumber()
   {
      k = super.addNumber(i,j);  

      System.out.println("k=" + k);
   }
}

public class UseSuperAndThis
{
   public static void main(String args[])
   {
      ChildClass C1,C2;              

      C1 = new ChildClass();       
      C2 = new ChildClass(5,10);
      C1.addNumber();              
      C2.addNumber();                
   }
}