javabigdecimal

BigDecimal adding wrong value

I have a BigDecimal defined like this:

private static final BigDecimal sd = new BigDecimal(0.7d);

if i print it, i get the value:

0.6999999999999999555910790149937383830547332763671875

which causes some wrong calculations. Does anyone know a way to get the exact value of 0.7 as BigDecimal? Change it to 0.71 would view the right result, but it shouldn't be like that

Solution

  • Use a String literal:

    private static final BigDecimal sd = new BigDecimal("0.7");

    If you use a double, actually public BigDecimal(double val) is called. The reason you do not get 0.7 is that it cannot be exactly represented by a double. See the linked JavaDoc for more information.