用java实现画曼德勃罗集(Mandelbrot Set)及朱莉亚集(Julia Set)

import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JButton; import javax.swing.JCheckBoxMenuItem; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.JTextField; public class JuliaSet { public double dt=2;//初始距离为2； public double x=250;//原点像素x坐标 public double y=250;//原点像素y坐标 public boolean fa=false; public JuliaSet() { JFrame frame=new JFrame("Julia"); frame.setSize(800, 530); frame.setLocation(300,50); frame.setResizable(false); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(null); //JPanel panel1=new myDrawPanel(); JPanel panel1=new JPanel(); panel1.setBounds(0, 0, 500, 500); JPanel panel2=new JPanel(); panel2.setBackground(new Color(100,225,225)); panel2.setLocation(500, 0); panel2.setSize(new Dimension(300, 500)); //panel2.setBounds(500, 0, 300, 500); JLabel fun_label = new JLabel("Z(n+1)=Z(n)^i+C"); fun_label.setFont(new Font("雅黑", Font.PLAIN, 35)); JCheckBoxMenuItem boxMenu = new JCheckBoxMenuItem(); String str[]= {"曼德勃罗集 (Mandelbrot Set)","朱利亚集 (Julia Set)"}; JComboBox cBox = new JComboBox(str); JLabel label1 = new JLabel("次方值i："); JTextField text1=new JTextField(18); text1.setText("2"); JLabel label2 = new JLabel("Z值实部："); JTextField text2=new JTextField(18); text2.setText("0.0"); JLabel label3 = new JLabel("Z值虚部："); JTextField text3=new JTextField(18); text3.setText("0.0"); JLabel label4 = new JLabel("C值实部："); JTextField text4=new JTextField(18); JLabel label5 = new JLabel("C值虚部："); JTextField text5=new JTextField(18); JButton button = new JButton("画图"); button.setPreferredSize(new Dimension(200, 30)); JTextArea text6=new JTextArea("☝☝☝☝☝点击画图☝☝☝☝☝"); //text6.setPreferredSize(new Dimension(100, 200)); text6.setBackground(new Color(100,225,225)); text6.setEditable(false); text4.setEditable(false); text5.setEditable(false); panel2.add(fun_label); panel2.add(label1); panel2.add(text1); panel2.add(label2); panel2.add(text2); panel2.add(label3); panel2.add(text3); panel2.add(label4); panel2.add(text4); panel2.add(label5); panel2.add(text5); panel2.add(cBox); panel2.add(button); panel2.add(text6); frame.add(panel1); frame.add(panel2); //container.add(panel2); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { int n=0; double zreal = 0,zimag = 0,creal = 0,cimag = 0; if (!text1.getText().equals("")) { n=Integer.parseInt(text1.getText()); } if(!text2.getText().equals("")) { zreal=Double.parseDouble(text2.getText()); } if(!text3.getText().equals("")) { zimag=Double.parseDouble(text3.getText()); } if(!text4.getText().equals("")) { creal=Double.parseDouble(text4.getText()); } if(!text5.getText().equals("")) { cimag=Double.parseDouble(text5.getText()); } dt=2; x=250; y=250; draw(panel1,cBox,zreal,zimag,creal,cimag,n,dt,x,y);//2是距离 ,(250,250)原点的像素坐标 text6.setText("图片中心位置的复数值:\n实部的值:"+0.0+"\n虚部的值:"+0.0+ "\n实部的范围:\n("+-2+","+2+")\n虚部的范围:\n("+ -2+","+2+")"); fa=true; } }); cBox.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { String string=(String)cBox.getSelectedItem(); if(string.equals("曼德勃罗集 (Mandelbrot Set)")) { text1.setText("2"); text2.setText("0.0"); text3.setText("0.0"); text4.setText(""); text5.setText(""); text2.setEditable(true); text3.setEditable(true); text4.setEditable(false); text5.setEditable(false); }else if(string.equals("朱利亚集 (Julia Set)")){ text1.setText("2"); text2.setText(""); text3.setText(""); text4.setText("0.3"); text5.setText("0.5"); text2.setEditable(false); text3.setEditable(false); text4.setEditable(true); text5.setEditable(true); } } }); panel1.addMouseListener(new MouseAdapter() { int n=0; double zreal = 0,zimag = 0,creal = 0,cimag = 0; double x_r=0,y_r=0; //double x,y; //public double dt=2;//初始距离为2； public void mouseClicked(MouseEvent e) { if(fa) { if (!text1.getText().equals("")) { n=Integer.parseInt(text1.getText()); } if(!text2.getText().equals("")) { zreal=Double.parseDouble(text2.getText()); } if(!text3.getText().equals("")) { zimag=Double.parseDouble(text3.getText()); } if(!text4.getText().equals("")) { creal=Double.parseDouble(text4.getText()); } if(!text5.getText().equals("")) { cimag=Double.parseDouble(text5.getText()); } x_r=(e.getX()-x)/(250/dt); y_r=(y-e.getY())/(250/dt); x=(e.getX()-x)*dt; y=(y-e.getY())*dt; if (e.getButton() == e.BUTTON1) { //左击 dt=dt/2; x=250-(x/dt); y=250+(y/dt); draw(panel1,cBox,zreal,zimag,creal,cimag,n,dt,x,y); }else if(e.getButton() == e.BUTTON3) { //右击 dt=dt*2; x=250-(x/dt); y=250+(y/dt); draw(panel1,cBox,zreal,zimag,creal,cimag,n,dt,x,y); } text6.setText("图片中心位置的复数值:\n实部的值:"+x_r+"\n虚部的值:"+y_r+ "\n实部的范围:\n("+(x_r-dt)+","+(x_r+dt)+")\n虚部的范围:\n("+ (y_r-dt)+","+(y_r+dt)+")"); }else { JOptionPane.showMessageDialog(null, "请先画图!", "警告", JOptionPane.WARNING_MESSAGE); } } }); frame.setVisible(true); //draw(panel1, cBox, 0.0, 0.0, 0.0, 0.0, 2, 2, 250, 250); } //画图函数 public void draw(JPanel panel, //。。。。 JComboBox cBox, //下拉框用了判断是哪种集合 double zreal, //z的实部 double zimag, //z的虚部 double creal, //c的实部 double cimag, //c的虚部 int n, // 次方数 double distance, // 二分之一屏幕代表的举例 double xx,double yy) { //原点的像素坐标 Graphics graphics=panel.getGraphics(); int color []= new int [3]; int i, j; double weight = 512/256; //设置128个色，比较好看 int width_size=500; //屏幕像素个数 int height_size=500; double orig_x = xx;//width_size/distance; //原点的像素x坐标 double orig_y = yy;//height_size/distance;//原点的像素y坐标 double we = width_size/(distance*2); //每个像素代表的真实值得倒数 int w = 0; boolean flash=true; if(cBox.getSelectedIndex()==0) flash=true; else flash=false; for (i = 0; i < height_size; i++) { for (j = 0; j < width_size; j++) { //变量iter表示迭代次数 double x=(double)(j - orig_x) / we; double y=(double)(orig_y - i) / we; int iter; if(flash) iter = iteration(zreal , zimag , x , y , n); //zreal,zimag,cral,cimag,pow_num else iter = iteration(x , y , creal , cimag , n); 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