UGC NET CSE | June 2019 | Part 2 | Question: 23

Question

What is the output of the following JAVA program?

public class Good {
    private int m;
    public Good (int m){this.m=m;}
    public Boolean equals (Good n) {return n.m==m;}
    public static void main (string args[]){
        Good m1 = new Good(22);
        Good m2 = new Good(22);
        Object s1 = new Good(22);
        Object s2 = new Good(22);
        System.out.println(m1.equals(m2));
        System.out.println(s1.equals(s2));
        System.out.println(m1.equals(s2));
        System.out.println(s1.equals(m2));
    }
}

• A. True, True, False, False
• B. True, False, True, False
• C. True, True, False, True
• D. True, False, False, False

Answer 1

marks given to all

Answer 2

D. True, False, False, False

public class Good {
    private int m;
    public Good (int m){this.m=m;}
    public Boolean equals (Good n) {return n.m==m;}
    public static void main (String args[]){
        Good m1 = new Good(22);
        Good m2 = new Good(22);
        Object s1 = new Good(22);
        Object s2 = new Good(22);
        System.out.println(m1.equals(m2));
        System.out.println(s1.equals(s2));
        System.out.println(m1.equals(s2));
        System.out.println(s1.equals(m2));
    }
}