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  1. JDK
  2. JDK-8059175

Zero BigDecimal with negative scale prints leading zeroes in String.format

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Details

    • Bug
    • Resolution: Fixed
    • P4
    • 9
    • 8
    • core-libs
    • b46
    • x86_64
    • linux

    Backports

      Description

        FULL PRODUCT VERSION :
        java version "1.8.0"
        Java(TM) SE Runtime Environment (build 1.8.0-b132)
        Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)


        ADDITIONAL OS VERSION INFORMATION :
        Linux tim-desktop 3.2.0-69-generic #103-Ubuntu SMP Tue Sep 2 05:02:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

        A DESCRIPTION OF THE PROBLEM :
        Printing a zero-valued BigDecimal with negative scale (e.g. 0 * 10^34) using String.format conversion 'f' prints extraneous leading zeroes, contrary to the API description.

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        Execute the following lines:

        BigDecimal x = new BigDecimal(BigInteger.ZERO, -6);
        System.out.println(String.format("%.4f", x));


        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        The expected output is

        0.0000

        ACTUAL -
        The actual output is

        0000000.0000


        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        import java.math.BigDecimal;
        import java.math.BigInteger;

        public class Temp {
        public static void main(String[] args) {
        BigDecimal x = new BigDecimal(BigInteger.ZERO, -6);
        System.out.println(String.format("%.4f", x));
        }
        }

        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        Converting the value to a nonnegative scale works around the problem.


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                bpb Brian Burkhalter
                webbuggrp Webbug Group
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                  Created:
                  Updated:
                  Resolved: