如何在不舍入的情况下截断Java中的小数？

如何在不舍入的情况下截断Java中的小数？

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