java program 3:

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java program 3:

a simple program demonstrating the concept of inheritance ..
class a
{
int i,j;
void show()
{
System.out.println("i and j"+i+""+j);
}
}
class b extends a
{
 int k;
 void showk(){
 System.out.println("k:"+k);
 }
 void sum()
 {
 System.out.println("i+j+k:"+(i+j+k));
 }
 }
  class inherit
  {
  public static void main(String args[])

 { a superob=new  a();
  b subob=new b();
  superob.i=10;
  subob.j=20;

  subob.showk();
  System.out.println("Contents of superOb") ;
  subob.i=7;
  subob.j=10;
  subob.k=11;
  System.out.println("Contents of subob");
  subob.showk();
  System.out.println("Sum of i,j,k in subob");
  subob.sum();

  }
  }