chelei.java

Java程序

class vehicle
{public int wheels;
  public int weigth;
  public void out(int x,int y)
   {System.out.println("Wheels number is:"+x);
    System.out.println("weigth is:"+y);
   } 
}
class car extends vehicle
{public int passenner_load;
 public void out(int x,int y,int z)
  {out(x,y);
   System.out.println("passenner_load number is:"+z);
  }
}  
class truck extends car
{public int payload;
  public void out(int x,int y,int z,int p)
   {out(x,y,z);
    System.out.println("The payload is:"+p);
   }
}
public class chelei
{public static void main(String args[])
 {car cc=new car();
  truck tt=new truck();
  cc.out(4,4,200);
  tt.out(20,6,600,1000);
 }
}