用java代码创建一个计算类,实现加减乘除运算 并写出测试类

下面是一个简单的 Java 计算器类和测试类：

public class Calculator {
    public static int add(int a, int b) {
        return a + b;
    }

    public static int subtract(int a, int b) {
        return a - b;
    }

    public static int multiply(int a, int b) {
        return a * b;
    }

    public static int divide(int a, int b) {
        if (b == 0) {
            throw new IllegalArgumentException("Divisor cannot be zero");
        }
        return a / b;
    }
}

测试类：

public class CalculatorTest {
    public static void main(String[] args) {
        int a = 10;
        int b = 5;

        System.out.printf("%d + %d = %d%n", a, b, Calculator.add(a, b));
        System.out.printf("%d - %d = %d%n", a, b, Calculator.subtract(a, b));
        System.out.printf("%d * %d = %d%n", a, b, Calculator.multiply(a, b));
        System.out.printf("%d / %d = %d%n", a, b, Calculator.divide(a, b));
    }
}

输出：

10 + 5 = 15
10 - 5 = 5
10 * 5 = 50
10 / 5 = 2