Java 中分形图的几种方法详解

public class Complex {    public double r;  public double i;    public Complex(double real,double image){    this.r=real;    this.i=image;  }  //取复数的模  public double modulus(){    return Math.sqrt(r*r+i*i);  }  //复数的加法  public Complex add(Complex z){    double addr=r+z.r;    double addi=i+z.i;    return new Complex(addr,addi);  }  //复数的乘法  public Complex mul(Complex z){    double mulr=r*z.r-i*z.i;    double muli=i*z.r+r*z.i;    return new Complex(mulr,muli);  }}