Using String format for doubles

Question

Is it possible to format for example a double of value 0.41 to 00.41 using only String format ? In other words, is it possible to left zero pad doubles ? The result I would like should show as xx.xx

Unfortunately I haven't been able to find something simple although I am sure there is a simple solution... I have tried %02.2f but it doesn't work...

Thank you for your help !

Why is my question marked as duplicate ? I am asking about doubles not integers... i know that it works for integers but I don't understand why it doesn't work for doubles... — beetix, May 30 '15 at 18:08
Then show _how_ it doesn't work. Give us reproducible example. — Sotirios Delimanolis, May 30 '15 at 18:09
If I use String.format("%02.2f", myDouble) and that myDouble = 0.41, it will print 0.41 and not 00.41 — beetix, May 30 '15 at 18:14
Please add that to your question. The number you provide after the `0` is the width. `0.41` already exceeds the width so no additional padding will be added. — Sotirios Delimanolis, May 30 '15 at 18:16
[Here's the javadoc.](https://docs.oracle.com/javase/8/docs/api/java/util/Formatter.html) — Sotirios Delimanolis, May 30 '15 at 18:16

score 2 · Accepted Answer · edited May 30 '15 at 18:25

2

Try this

public class DoubleFormat {
    public static void main(String[] args) {
        float f =  0.41f;
        String s = Float.toString(f);

        System.out.println("0"+s); //Or
        System.out.printf("%05.2f\n", f);
    }
}

edited May 30 '15 at 18:25

Sotirios Delimanolis

274,122
60
696
724

answered May 30 '15 at 18:13

Razib

10,965
11
53
80

It won't work with, for example, 14.01 which with your code would give 014.01. I would like two digits before the "." and two after. – beetix May 30 '15 at 18:20

Using String format for doubles

1 Answers1