java中神奇的Double

 Double的失精度有点严重！

    public static void main(String[] args) {
        BigDecimal nodePoolMemory = new BigDecimal("15.3");
        BigDecimal nodeMemory = new BigDecimal(15.3D);
        BigDecimal subtract1 = nodePoolMemory.subtract(nodeMemory);
        System.out.println(subtract1);
        BigDecimal nodePoolMemory1 = new BigDecimal("15.3");
        BigDecimal nodeMemory1 = BigDecimal.valueOf(15.3D);
        BigDecimal subtract11 = nodePoolMemory1.subtract(nodeMemory1);
        System.out.println(subtract11);
    }

    public static void main(String[] args) {
        System.out.println(0.3+0.6);
    }