Single Inheritance Java

Inheritance is  a feature of reusing the code.Without starting from scratch we can create a new class(Child,Subclass) having all features of old(Parent,Superclass) in addition to its own features.

Syntax:  class Subclass name extends Superclass name
{

//body of sub class

}

Following Code will illustrate the concept:

Code::

class Super
{
    int a,b;
    void show()
    {
        System.out.println(a+b);
    }
}
class Sub extends Super
{
    int c;
    void display()
    {
        System.out.println(a+b+c);     // a,b are the members of superclass
    }
}
public class Inheritance
{

    public static void main(String[] nt)
    {
        Super ob=new Super();
        Sub ob2=new Sub();
        ob.a=50;
        ob.b=20;
        ob2.a=50;
        ob2.b=20;
        ob2.c=10;
        ob.show();
        ob2.display();
    }
}

Output::

Above example also illustrate the fact that we can use a superclass itself.