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javabigdecimal

BigDecimal stripTrailingZeros doesn't work for zero

I have met strange bug in my code.

It relates with 

new BigDecimal("1.2300").stripTrailingZeros()

returns 1.23(correct)

but 

new BigDecimal("0.0000").stripTrailingZeros()

returns 0.0000(strange), thus nothing happens

Why?

How to fix it?

Solution

  • Seems that this is a bug (JDK-6480539) which was fixed in Java 8 (per OpenJDK commit 2ee772cda1d6).

    Workaround for earlier versions of Java:

    BigDecimal zero = BigDecimal.ZERO;
if (someBigDecimal.compareTo(zero) == 0) {
    someBigDecimal = zero;
} else {
    someBigDecimal = someBigDecimal.stripTrailingZeros();
}