Use of SUPER keyword to invoke the constructor of parent class.

class Parent
{
int a;
Parent()
{
  System.out.println("This is Parent default constructor");
}
Parent(int x)
{
  a = x;
  System.out.println("This is Parent param constructor");
}
}
class Super extends Parent
{
int b;
Super()
{
  System.out.println("This is Super(child) Default constructor");
  }
Super(int z)
{
  super(z); //must be the first line of this constructor..
  System.out.println("This is Super(child) param constructor");
}
public static void main(String []ars)
{
  Super obj = new Super(8);
  Super obj1 = new Super();
  }
}