Complex复数类

public class Complex {    private double RealPart;//实部    private double ImagePart;//虚部    /* 定义构造函数 */    public Complex(){    }    /* 含参构造方法*/    public Complex(double realPart, double imagePart){        this.RealPart = realPart;        this.ImagePart = imagePart;    }    public void setRealPart(double realPart){        this.RealPart = realPart;    }    public void setImagePart(double imagePart){        this.ImagePart = imagePart;    }    public double getRealPart(){        return RealPart;    }    public double getImagePart(){        return ImagePart;    }    /* 复数的加法 */    public Complex add(Complex o1){        double realPart1 = this.getRealPart() + o1.getRealPart();        double imagePart1 = this.getImagePart() + o1.getImagePart();        return new Complex(realPart1,imagePart1);    }    /* 复数的减法 */    public  Complex subtract(Complex o1){        double realPart1 = this.getRealPart() - o1.getRealPart();        double imagePart1 = this.getImagePart() - o1.getImagePart();        return new Complex(realPart1,imagePart1);    }    /* 复数的乘法 */    public Complex multiply(Complex o1){        double realPart1;        double imagePart1;        if(this.getImagePart() != 0 && o1.getImagePart() != 0){            realPart1 = (this.getRealPart() * o1.getRealPart()) - (this.getImagePart() * o1.getImagePart());            imagePart1 = (this.getRealPart() * o1.getImagePart()) + (this.getImagePart() * o1.getRealPart());        }        else{            realPart1 = (this.getRealPart() * o1.getRealPart());            imagePart1 = (this.getRealPart() * o1.getImagePart()) + (this.getImagePart() * o1.getRealPart());        }        return new Complex(realPart1,imagePart1);    }    /* 复数的除法 */    public Complex divide(Complex o1){        double realPart1;        double imagePart1;        realPart1 = (this.getRealPart() * o1.getRealPart()) + (this.getImagePart() * o1.getImagePart()) / (o1.getImagePart() * o1.getImagePart() + o1.getRealPart() * o1.getRealPart());        imagePart1 = (this.getImagePart() * o1.getRealPart()) - (this.getRealPart() * o1.getImagePart()) / (o1.getImagePart() * o1.getImagePart() + o1.getRealPart() * o1.getRealPart());        return new Complex(realPart1,imagePart1);    }

    
    public String toString(){        return this.RealPart+" + "+this.ImagePart+"i";    }

}