Explain....Inheritance

[Shiaber Shaam]

class Super
{
void method(Super s1)
{
System.out.println("Super");
}
}

class Sub extends Super
{
void method(Sub sb1)
{
System.out.println("Sub");
}
}

class TestInher
{
public static void main(String [] args)
{
Super sp1 = new Super();
Sub sb1 = new Sub();
Super spb = new Sub();

spb.method(sp1); //Produces O/P Super "No Doubt in it"
spb.method(sb1); //Produces O/P Super "Why"
spb.method(spb); //Produces O/P Super "No Doubt in it"
}
}

// I thought that it should print "Sub" for second method call...
// Why it prints "Super".....
// When we call method using super class reference and sub type
// object, the method in the sub class should be called... But, here
// Why the super class method is called... Plz explain.....

[Vladimir Scheglov]

class Sub extends Super
{
void method(Sub sb1) //oveloading, no overriding
{
System.out.println("Sub");
}
}


Sub sb1 = new Sub();
Super spb = new Sub();

spb.method(sb1); //spb is Super and Super dont know about overloading method in Sub

If you need overriding


class Sub extends Super
{
void method(Super sb1)
{
System.out.println("Sub");
}
}