I am stuck in a java code and i dont understant why it is not return true

Question

This Java code below is not returning true in if else statement...

public class DecimalComparator {

    public static void main(String[] args) {
        System.out.println(areEqualByThreeDecimalPlaces(25.367876,25.367873));
    }

    public static boolean areEqualByThreeDecimalPlaces(double a, double b){

        DecimalFormat threePreshizen = new DecimalFormat("###.###");
        String aNew = threePreshizen.format(a);
        String bNew = threePreshizen.format(b);

        System.out.println(aNew);
        System.out.println(bNew);

        if (aNew == bNew){
            return true;
        }else {
            return false;
        }
    }
}

I expect it to return "true".

Compare Strings with .equals(). Also, just `return aNew.equals(bNew)` and remove the if/else — DustInComp, Jun 18 '19 at 08:41
You are comparing two different object. Use the .equals() method. — Rashin, Jun 18 '19 at 08:42

score 0 · Accepted Answer · answered Jun 18 '19 at 08:42

0

Replace your if block with the following:

return aNew.equals(bNew);

This returns a boolean based on if content of the two strings matches, rather than if the value of their memory reference is identical.

If you expect either of your strings to be null, instead use

return Objects.equals(aNew, bNew);

answered Jun 18 '19 at 08:42

Austin Schaefer

695
5
19

Thank you Austin Schäfer. I solved it – DangerDeveloper Jun 18 '19 at 09:30
Please accept the answer then so that anyone who runs into this question in the future can reference it. – Austin Schaefer Jun 18 '19 at 09:50

I am stuck in a java code and i dont understant why it is not return true

1 Answers1