How get float number with no rounded number in java

Question

I have this float 98.01645 and I'm getting 98.02 with this function:

    String lastCredit = String.format("%.2f", AppSingleton.getInstance().credit);

That I want is get 98.01 (only two decimals or not rounded number). I'm trying but I can't get the way to do it work.

score 3 · Accepted Answer · answered Mar 09 '18 at 12:13

Doing it manually:

String lastCredit = String.format("%.2f", java.lang.Math.floor(100.0*AppSingleton.getInstance().credit)*0.01);

Multiplying by 100.0 to move the decimal point two to the right, then rounding down, then moving the decimal point two to the left by multiplying with 0.01.

score 1 · Answer 2 · answered Mar 09 '18 at 12:14

You can try this

    String lastCredit = String.format("%.2f",Math.floor((98.01645 * 100)) / 100);
    System.out.println(lastCredit);

You basically multiply the value by 100 because you need 2 numbers after the decimal and round down that value. After you have the result you divide it by 100 again.

Archana · Answer 3 · 2018-03-09T12:19:54.170

0

Use below code instead of String lastCredit = String.format("%.2f", AppSingleton.getInstance().credit);

    DecimalFormat decimalFormat = new DecimalFormat("#.##");
    decimalFormat.setRoundingMode(RoundingMode.FLOOR);
    String lastCredit = decimalFormat.format(f);

edited Mar 09 '18 at 12:19

answered Mar 09 '18 at 12:10

Archana

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is returning 98,2 and not 98,01 – S.P. Mar 09 '18 at 12:13
@S.P. Updated the code Please check. – Archana Mar 09 '18 at 12:20
@DawoodibnKareem +1 for correcting me. – Archana Mar 09 '18 at 12:21

score 0 · Answer 4 · answered Mar 09 '18 at 12:17

0

I would not call this elegant, but you can just use String.format to get 3 decimal places and remove the last using substring:

String lastCredit = String.format("%.3f", AppSingleton.getInstance().credit);
lastCredit = lastCredit.substring(0, lastCredit.length() - 1);

answered Mar 09 '18 at 12:17

eike

1,314
7
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This assumes that "%.2f" gives you trailing zeros, which I cannot test, because I am on mobile right now. – eike Mar 09 '18 at 12:19

How get float number with no rounded number in java

4 Answers4