class Human{
public static void walk()
{
System.out.println("Human walks");
}
}
class Boy extends Human{
public static void walk(){
System.out.println("Boy walks");
}
public static void main( String args[]) {
/* Reference is of Human type and object is
* Boy type
*/
Human obj = new Boy();
/* Reference is of HUman type and object is
* of Human type.
*/
Human obj2 = new Human();
obj.walk();
obj2.walk();
}
}