JAVA PROGRAMS-Java Program using Super key

Java Program using Super key

Program Name:-  superkey.java

class rectangle

{

int length,breadth;

 rectangle(int l,int m)

 {

 length=l;

 breadth=m;

 }

 int area()

 {

 int a;

 a=length*breadth;

 return(a);

 }

}

class box extends rectangle

{

int height;

 box(int l,int b,int h)

 {

 super(l,b);

 height=h;

 }

 int volume()

 {

 int v;

 v=length*breadth*height;

 return(v);

 }

}

class superkey

{

 public static void main(String args[])

 {

 box in=new box(10,10,10);

 int a,v;

 a=in.area();

 v=in.volume();

 System.out.print("\nArea\t:"+a);

 System.out.print(" \nVolume\t:"+v);

 }

}