Two integer is equal but i am getting false

Question

When I give some input for two values if they are equal ,it prints "True" in the terminal.But when both input is 128 I get false. Why?

public static void main(String[] args) {
    Scanner reader=new Scanner(System.in);
    System.out.println("Enter your first number :");
    Integer number1 = reader.nextInt();
    System.out.println("Enter your second number: ");
    Integer number2 = reader.nextInt();
    if (number1 == number2)
    {
        System.out.println("True");
    }
    else{
        System.out.println("False");
    }
}

Input:

128

Output:(Should be) True

But I get:

False

Integers are objects. `==` compares them by object identity (are these the same object) instead of value equality (represent these the same value). — Thomas Kläger, Dec 04 '17 at 05:06
== checks for object equality not the equality of values of objects. You can use compare method of Integer class. — Türkmen Mustafa Demirci, Dec 04 '17 at 05:06

score 1 · Answer 1 · answered Dec 04 '17 at 05:05

1

use equals instead of ==:

if (number1.equals(number2)) {
    System.out.println("True");
}
else {
    System.out.println("False");
}

answered Dec 04 '17 at 05:05

Rasool Ghafari

4,128
7
44
71

Any explaination, why == doesnt work after integer 128 ? – voucher_wolves Dec 04 '17 at 05:06
1

@yashpandey because it doesn't have to – Alexander Kulyakhtin Dec 04 '17 at 05:07
1

I think here is some serious discussion about this - https://stackoverflow.com/questions/1700081/why-does-128-128-return-false-but-127-127-return-true-when-converting-to-integ – voucher_wolves Dec 04 '17 at 05:08

Two integer is equal but i am getting false

1 Answers1