Why does new BigDecimal(“0.0”).stripTrailingZeros() have a scale of 1?

Question

Running this simple program:

public static void main(final String... args)
{
    System.out.println(BigDecimal.ZERO.scale());
    System.out.println(new BigD         


        

Answer 1

In fact "0.0" is the exception as it does no stripTrailingZeroes. A bug!

public static void main(final String... args) {
    p("0");
    p("0.0");
    p("1.0");
    p("1.00");
    p("1");
    p("11.0");
}

private static void p(String s) {
    BigDecimal stripped = new BigDecimal(s).stripTrailingZeros();
    System.out.println(s + " - scale: " + new BigDecimal(s).scale()
        + "; stripped: " + stripped.toPlainString() + " " + stripped.scale());
}

0 - scale: 0; stripped: 0 0
0.0 - scale: 1; stripped: 0.0 1
1.0 - scale: 1; stripped: 1 0
1.00 - scale: 2; stripped: 1 0
1 - scale: 0; stripped: 1 0
11.0 - scale: 1; stripped: 11 0

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Fixed in Java 8! See @vadim_shb's comment.