java-java计算

使用BigDecimal类进行金额的加减乘除运算

        BigDecimal amount1 = new BigDecimal("10.50");
        BigDecimal amount2 = new BigDecimal("5.25");

        // 加法运算
        BigDecimal sum = amount1.add(amount2);
        System.out.println("Sum: " + sum);

        // 减法运算
        BigDecimal difference = amount1.subtract(amount2);
        System.out.println("Difference: " + difference);

        // 乘法运算
        BigDecimal product = amount1.multiply(amount2);
        System.out.println("Product: " + product);

        // 除法运算
        BigDecimal quotient = amount1.divide(amount2, 2, BigDecimal.ROUND_HALF_UP);
        System.out.println("Quotient: " + quotient);

输出结果

Sum: 15.75
Difference: 5.25
Product: 55.1250
Quotient: 2.00

在进行除法运算时，我们指定了保留小数点后两位，并使用 BigDecimal.ROUND_HALF_UP 进行四舍五入