Question

How to check if an Integer is Null or Zero in Java

Answer 1

public class Main {
    public static boolean NullorZero(Integer num) {
        return num == null || num == 0;
    }
    public static void main(String[] args) {
        Integer num = 0;
        
        if (NullorZero(num)) {
            System.out.println("The Integer is null or zero");
        } else {
            System.out.println("The Integer is not null or zero");
        }
    }
}



/*
run:

The Integer is null or zero 

*/

 

70+ SQL courses for beginners and professionals

Answer 2

public class Main {
    public static boolean NullorZero(Integer num) {
        return 0 == (num == null ? 0 : num);
    }
    public static void main(String[] args) {
        Integer num = null;
        
        if (NullorZero(num)) {
            System.out.println("The Integer is null or zero");
        } else {
            System.out.println("The Integer is not null or zero");
        }
    }
}



/*
run:

The Integer is null or zero 

*/

 

70+ SQL courses for beginners and professionals