Java Program To Call Super Class Constructor

by

Aim:

Write a JAVA program give example for “super” keyword

Program:

A) Using super to call super class constructor (Without parameters)

class A
{
int l,b;
A()
{
l=10;
b=20;
}
}
class B extends A
{
int h;
B()
{
super();
h=30;
}
int volume()
{
return l*b*h;
}
}
class superdemo
{
public static void main(String args[])
{
B b1=new B();
int r=b1.volume();
System.out.println("The vol. is: "+r);
}
}

Output:

The vol. is:6000

Program:

B) Using super to call super class constructor (With parameters)

class A
{
int l,b;
A(int u,int v)
{
l=u;
b=v;
}
}
class B extends A
{
int h;
B(int u,int v,int w)
{
super(u,v);
h=w;
}
int volume()
{
return l*b*h;
}
}
class superdemo
{
public static void main(String args[])
{
B b1=new B(30,20,30);
int r=b1.volume();
System.out.println("The vol. is: "+r);
}
}

Output:

The vol. is:18000

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