java复数的加减乘除

在Java中，复数是由实部和虚部组成的一对数值，通常表示为a + bi的形式，其中a是实部，b是虚部，i代表虚数单位，其满足i² = -1。Java并没有内置复数类型，但我们可以通过自定义类或者使用第三方库如`java.util.Complex`来处理复数。

如果你需要自定义实现，可以创建一个名为Complex的类，包含两个double类型的属性（real和imaginary），并提供加法、减法、乘法和除法的方法：

public class Complex {
    private double real;
    private double imaginary;

    // 构造函数
    public Complex(double real, double imaginary) {
        this.real = real;
        this.imaginary = imaginary;
    }

    // 加法
    public Complex add(Complex other) {
        return new Complex(this.real + other.real, this.imaginary + other.imaginary);
    }

    // 减法
    public Complex subtract(Complex other) {
        return new Complex(this.real - other.real, this.imaginary - other.imaginary);
    }

    // 乘法
    public Complex multiply(Complex other) {
        double realPart = this.real * other.real - this.imaginary * other.imaginary;
        double imaginaryPart = this.real * other.imaginary + this.imaginary * other.real;
        return new Complex(realPart, imaginaryPart);
    }

    // 除法（假设除数不为0）
    public Complex divide(Complex divisor) {
        double denominator = divisor.real * divisor.real + divisor.imaginary * divisor.imaginary;
        return new Complex((this.real * divisor.real + this.imaginary * divisor.imaginary) / denominator,
                (this.imaginary * divisor.real - this.real * divisor.imaginary) / denominator);
    }
}

// 使用示例
Complex c1 = new Complex(3, 4);
Complex c2 = new Complex(1, 2);
Complex sum = c1.add(c2);
Complex difference = c1.subtract(c2);
Complex product = c1.multiply(c2);
Complex quotient = c1.divide(c2); // 假设c2非零