code of abstract method

 abstract public class Myclass {
    // compete method
    public void calculator(){
        System.out.println("calculating results in java ");
    }
    // abstract method
    abstract void lanchRocket(){
        System.out.println("here is the abstrat method");
    }
}
abstract class Mychild extends Myclass{
         public void lanchRocket(){
        System.out.println("my child class lanch rocket");
         }
         public static void main(String[] args) {
            Mychild m1=new Mychild() {
                m1.lanchRocket();
            };
         }
}