进制转换

将一个浮点数转换为一个IEEE745规范的二进制

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public class FloatDemo {
    public static void main(String[] args) {
        String value = convert(100.2f);
        System.out.println(value);
    }

    private static String convert(float num) {
        int intVal = Float.floatToIntBits(num);
        return intVal > 0 ? "0" + Integer.toBinaryString(intVal) : Integer.toBinaryString(intVal);
    }
}

求32位整数在机器中的补码

public class IntDemo {
    public static void main(String[] args) {
        int a = 6576;
        for (int i = 0; i < 32; i++) {
            int t = (a & 0x80000000 >>> i) >>> (31 - i);
            System.out.print(t);
        }
    }
}