PROGRAM FOR SINGLE INHERITANCE

A.java                           /file name
~~~~~
public class A                        //parent class (or) superclass
{
int i,j;
void showij()
{
System.out.println("i and j : "+i+" "+j);
}
}

B.java                                   //filename

~~~~~

public class B extends A                                  //child class

{

int k;

void showk()

{

System.out.println("K : "+k);

}

void sum()

{

System.out.println("i+j+k="+(i+j+k));

}

}

C.java:

~~~~~

public class simpleinheritance 

{

public static void main(String args[])

{

A superob=new A();              //creating object for parent class 

B subob=new B();                       //object creation for child class

superob.i=10;

superob.j=20;                           // assigning vales to super class variables

               System.out.println("Contents of superob :");

superob.showij();

System.out.println();

subob.i=7;

subob.j=8;

subob.k=9;

System.out.println("Contents of subob : ");

subob.showij();                                             // calling parent class function at child class

subob.showk();

System.out.println();

System.out.println("Sum of i,j and k in subob : ");

subob.sum();

}

}