Monday Revision

 package com.company;

//import java.util.Scanner;

interface one{
    public void sing();
    private void hello(){
        System.out.println("hello");
    }
    default void two(){
        hello();
    }
}
class four implements one{
    public void sing(){
        System.out.println("Singing");
    };
}
abstract class Shape{
    public void meth1(int a){
        System.out.println("Hello world " + a);
    }
    public abstract void meth2();
}
class Rhombus extends Shape{
    @Override
    public void meth1(int a){
        System.out.println("Bye world!");
    }
    public void meth2(){
        System.out.println("Rohan Kumar");
    }
    public void meth3(){
        System.out.println("Helooooo jeeeeeeeeee");
    }
}
/* class Animal1{
    public Animal1(){
        System.out.println("I am a constructor of Base class");
    }
    public Animal1(String s){
        System.out.println("I am a constructor of Base class and " + s);
    }
    public void color(String color){
        System.out.println("The color of animal is "+ color);
    }
    public void name(String name){
        System.out.println("My name is " + name);
    }
}

class dog2 extends Animal1{
    public dog2(){
        super("rohan");
        System.out.println("I am a constructor of child class");
    }
    public void bark(){
        System.out.println("barking");
    }
    public void breed(String breed){
        System.out.println("Breed is " + breed);
    }
}
 */
public class CWr_Monday {
    public static void main(String[] args) {
//dog2 obj= new dog2();
Shape obj= new Rhombus();
obj.meth1(8);
String q= new java.lang.String("rohan");

//        four obj = new four();
//        obj.two();
    }
}