Exercise - 6 (Inheritance - Continued)

Exercise - 6 (Inheritance - Continued)

a). Write a JAVA program give example for “super” keyword.

//Write a program to implement 'super' keyword

class One
{
protected int a;
One(int i)
{
this.a=i;
}
void display()
{
System.out.println("Super class method:a="+a);
}
}
class Two extends One
{
protected int a;
        Two(int i,int j)
  {
  super(i);
    a=j;
  }
  void display()
  {
  super.display();
  System.out.println("Sub class method:a="+a);
 
  }
}
class Super1
{
  public static void main(String args[])
  {
  Two t=new Two(9,6);
  t.display();

}
}

b). Write a JAVA program to implement Interface. What kind of Inheritance can be achieved?

mport java.util.Scanner;
interface Base1
{
final double pie=3.14;
        void area();
}
class Base2
{
protected int r;
public void getdata()
{
Scanner s=new Scanner(System.in);
System.out.print("Enter the radius of the Circle:");
r=s.nextInt();
}
}
class Derived extends Base2 implements Base1
{
double area;
public void area()
{
area=pie*r*r;
System.out.println("Area of the Circle is:"+area);
}
}
class Inheritance
{
public static void main(String args[])
{
Derived d=new Derived();
                d.getdata();
d.area();
}
}

Multiple inheritance is achieved through interfaces