#60 How to find unique reference number for any class in java |Class के लिए unique reference number

package com.sudhirtheindian2.java123;

public class D1 {
    void display(){
        System.out.println(this);
    }
    public static void main(String[] args) {

        D1 d = new D1();
        System.out.println(d);
        d.display();

    }
}