Java在比较整数和Double时返回错误的布尔值。最小值[重复]

Question

public class Test {
    public static void main(String[] args) {
        boolean v1 = -25 <= Double.MIN_VALUE;
        boolean v2 = -25 <= -100.0;
        System.out.println(v1); //true
        System.out.println(v2); //false
    }
}

这里是-25




Answer 1

     **
     * A constant holding the smallest positive nonzero value of type
     * {@code double}, 2<sup>-1074</sup>. It is equal to the
     * hexadecimal floating-point literal
     * {@code 0x0.0000000000001P-1022} and also equal to
     * {@code Double.longBitsToDouble(0x1L)}.
     */
    public static final double MIN_VALUE = 0x0.0000000000001P-1022; // 4.9e-324

签入JDK whatdouble。最小值表示。

它说最小的正值！

负值-25将始终小于任何正数。