如果您想让事情变得简单快捷。;）
public static void main(String... args) { double[] values = {0.43678436287643872, 0.4323424556455654, 0.6575643254344554, -0.43678436287643872, -0.4323424556455654, -0.6575643254344554, -0.6575699999999999 }; for (double v : values) System.out.println(v + " => "+roundDown5(v));}public static double roundDown5(double d) { return ((long)(d * 1e5)) / 1e5; //Long typecast will remove the decimals}// Or this. Slightly slower, but faster than creating objects. ;)public static double roundDown5(double d) { return Math.floor(d * 1e5) / 1e5;}版画
0.43678436287643874 => 0.436780.4323424556455654 => 0.432340.6575643254344554 => 0.65756-0.43678436287643874 => -0.43678-0.4323424556455654 => -0.43234-0.6575643254344554 => -0.65756-0.6575699999999999 => -0.65756
