简单记录JAVA浮点类型判断BUG

   　　　//0.3*1==0.3 结果：true
        System.out.println("0.3*1==0.3 结果：" + (0.3 * 1 == 0.3));
        //0.1*3==0.3 结果：false
        System.out.println("0.1*3==0.3 结果：" + (0.1 * 3 == 0.3));
        //0.2 * 3 == 0.6 结果：false
        System.out.println("0.2 * 3 == 0.6 结果：" + (0.2d * 3d == 0.6d));
        //0.3 * 2 == 0.6 结果：true
        System.out.println("0.3 * 2 == 0.6 结果：" + (0.3d * 2d == 0.6d));
        //0.2 * 3 <= 0.6 结果：false
        System.out.println("0.2 * 3 <= 0.6 结果：" + (0.2d * 3d <= 0.6d));
        //0.3 * 2 >= 0.6 结果：true
        System.out.println("0.3 * 2 >= 0.6 结果：" + (0.3d * 2d >= 0.6d));
        //2 * 3 == 6 结果：true
        System.out.println("2 * 3 == 6 结果：" + (2 * 3 == 6));
        //3 * 2 == 6 结果：true
        System.out.println("3 * 2 == 6 结果：" + (3 * 2 == 6));
        BigDecimal t= BigDecimal.valueOf(0.3);
        BigDecimal t2= BigDecimal.valueOf(0.3);
        System.out.println("t 结果：" + t);
        //t.equals(t2) 结果：true
        System.out.println("t.equals(t2) 结果：" + (t.equals(t2) ));