Dynamic method dispatch is the mechanism by which a call to an overridden method  is resolved at run time, rather than compile time. Dynamic method dispatch is important because this is how Java implements run-time polymorphism.

1/. Create A.java

public class A {
    void callme(){
        System.out.println("Inside's A call me");
    }
}

2/.Create B.java

public class B extends A{

    void callme(){

        System.out.println("Inside's B call me");

    }

}

3/. Create C.java

public class C extends B{

    void callme(){

        System.out.println("Inside's C call me");

    }

}

4/. Create Override.java

public class Override {

    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        // TODO code application logic here

        A a=new A();

        B b=new B();

        C c=new C();

        A r; //otain a referent of type A

        

        r=a;//r refer object a

        r.callme();//call in class A

        

        r=b;//r refer object b

        r.callme();// call in class B

        

        r=c;//r refer object C

        r.callme();//call in class C

    }

}