Why doesn't Math.random() 's result show up in the [0.001, 0.01) range? [closed]

I tested the Math.random() method in Java, but the result didn't show up in the [0.001, 0.01) range, i wonder if this is accidental or algorithmic. Here is the code I tested:

public class TestMathRandom {
    public static void main(String[] args) {
        for (int i = 0; i < 100; i++)
            testRandom();
    }

    public static void testRandom() {
        int _1zero = 0;
        int _2zero = 0;
        int _3zero = 0;
        int _4zero = 0;
        int _nulZero = 0;
        for (int i = 0; i < 1000_000; i++) {
            double d = Math.random();
            /*System.out.print(d + "\t");
            if (i % 50 == 0)
                System.out.println();*/
            if (d * 10000 < 1.0)
                _4zero++;
            else if (d * 1000 < 1.0)
                _3zero++;
            else if (d * 100 < 1.0)
                _3zero++;
            else if (d * 10 < 1.0)
                _1zero++;
            else
                _nulZero++;
        }
        System.out.println();
        System.out.println("(0, 0.0001): " + _4zero);
        System.out.println("[0.0001, 0.001): " + _3zero);
        System.out.println("[0.001, 0.01): " + _2zero);
        System.out.println("[0.01, 0.1): " + _1zero);
        System.out.println("[0.1, 1): " + _nulZero);
        System.out.println();
    }
}

The program execution result is:

(0, 0.0001): 102 [0.0001, 0.001): 9923 [0.001, 0.01): 0 [0.01, 0.1): 90042 [0.1, 1): 899933

(0, 0.0001): 119 [0.0001, 0.001): 9963 [0.001, 0.01): 0 [0.01, 0.1): 90118 [0.1, 1): 899800

(0, 0.0001): 95 [0.0001, 0.001): 9871 [0.001, 0.01): 0 [0.01, 0.1): 89991 [0.1, 1): 900043

(0, 0.0001): 97 [0.0001, 0.001): 9958 [0.001, 0.01): 0 [0.01, 0.1): 90120 [0.1, 1): 899825

(0, 0.0001): 117 [0.0001, 0.001): 9872 [0.001, 0.01): 0 [0.01, 0.1): 89763 [0.1, 1): 900248

(0, 0.0001): 97 [0.0001, 0.001): 9695 [0.001, 0.01): 0 [0.01, 0.1): 89852 [0.1, 1): 900356

(0, 0.0001): 105 [0.0001, 0.001): 9812 [0.001, 0.01): 0 [0.01, 0.1): 90067 [0.1, 1): 900016

(0, 0.0001): 101 [0.0001, 0.001): 9922 [0.001, 0.01): 0 [0.01, 0.1): 89769 [0.1, 1): 900208

(0, 0.0001): 100 [0.0001, 0.001): 9972 [0.001, 0.01): 0 [0.01, 0.1): 89918 [0.1, 1): 900010

(0, 0.0001): 97 [0.0001, 0.001): 9987 [0.001, 0.01): 0 [0.01, 0.1): 90384 [0.1, 1): 899532

And my execution environment is:

Runtime version: 11.0.5+10-b520.30 x86_64 VM: OpenJDK 64-Bit Server VM macOS 10.15.5 GC: ParNew, ConcurrentMarkSweep Memory: 1981M Cores: 8