用java定义一个计算器类能够实现加减乘除

public class Calculator {

// 加法
public double add(double a, double b) {
    return a + b;
}

// 减法
public double subtract(double a, double b) {
    return a - b;
}

// 乘法
public double multiply(double a, double b) {
    return a * b;
}

// 除法
public double divide(double a, double b) {
    if (b == 0) {
        throw new IllegalArgumentException("除数不能为0");
    }
    return a / b;
}

}

// 使用示例 Calculator calculator = new Calculator(); double result = calculator.add(1, 2); System.out.println(result); // 输出3.0

result = calculator.subtract(4, 2); System.out.println(result); // 输出2.0

result = calculator.multiply(3, 5); System.out.println(result); // 输出15.0

result = calculator.divide(10, 2); System.out.println(result); // 输出5.0

result = calculator.divide(10, 0); // 抛出IllegalArgumentException异