1 package demo; 2 3 /** 4 * Jave 鼠标点击画太极 PaintTaiji (整理) 5 * 声明： 6 * 又是一份没有注释的代码，而且时间已经久远了，不过代码很短，解读起来应该 7 * 不会很麻烦。 8 * 9 * 2016-1-2 深圳 南山平山村 曾剑锋 10 */ 11 12 import java.awt.Color; 13 import java.awt.Graphics; 14 import java.awt.event.MouseEvent; 15 import java.awt.event.MouseListener; 16 import java.util.ArrayList; 17 18 import javax.swing.JFrame; 19 import javax.swing.JPanel; 20 21 public class PaintTaiji extends JPanel{ 22 private static final long serialVersionUID = 1L; 23 //所有的数据都是依照 24 static int centerX = 600/2; 25 static int centerY = centerX; 26 ArrayList<Taiji> taijis = new ArrayList<Taiji>(); 27 28 29 public PaintTaiji() { 30 startRun(); 31 this.addMouseListener(new MouseListener() { 32 33 @Override 34 public void mouseReleased(MouseEvent e) { 35 // TODO Auto-generated method stub 36 37 } 38 39 @Override 40 public void mousePressed(MouseEvent e) { 41 int mouseX = e.getX(); 42 int mouseY = e.getY(); 43 taijis.add(new Taiji(mouseX, mouseY)); 44 } 45 46 @Override 47 public void mouseExited(MouseEvent e) { 48 // TODO Auto-generated method stub 49 50 } 51 52 @Override 53 public void mouseEntered(MouseEvent e) { 54 // TODO Auto-generated method stub 55 56 } 57 58 @Override 59 public void mouseClicked(MouseEvent e) { 60 } 61 }); 62 } 63 @Override 64 public void paint(Graphics graphics) { 65 super.paint(graphics); 66 this.setBackground(Color.red); 67 for (Taiji taiji : taijis) { 68 taiji.paint(graphics); 69 } 70 } 71 72 public static void main(String[] args) { 73 JFrame jFrame = new JFrame(); 74 //设置JFrame标题 75 jFrame.setTitle("TaiJi"); 76 //设置JFrame的大小 77 jFrame.setSize(centerX*2, centerY*2); 78 jFrame.setLocationRelativeTo(null); 79 jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 80 81 PaintTaiji taiji = new PaintTaiji(); 82 jFrame.add(taiji); 83 84 //将窗口设置为可见 85 jFrame.setVisible(true); 86 } 87 public void startRun() { 88 new Thread(){ 89 public void run() { 90 while(true){ 91 try{ 92 for (Taiji taiji : taijis) { 93 taiji.angle += taiji.angleStep; 94 } 95 Thread.sleep(20); 96 } catch (InterruptedException e) { 97 e.printStackTrace(); 98 } 99 repaint(); 100 } 101 }; 102 }.start(); 103 } 104 } 105 class Taiji{ 106 int centerX; 107 int centerY; 108 int extendCircleSemi = (int)(Math.random()*200)+1; 109 int innerCircleSemi = extendCircleSemi/2; 110 //旋转角度，值由线程维护，大约每20ms自加1 111 int angle = 0; 112 int angleStep = (int)(Math.random()*6)+1; 113 public Taiji(int x, int y) { 114 centerX = x; 115 centerY = y; 116 } 117 118 public void paint(Graphics graphics ) { 119 graphics.setColor( Color.white); 120 graphics.fillArc( centerX-extendCircleSemi, 121 centerY-extendCircleSemi, 122 extendCircleSemi*2, 123 extendCircleSemi*2, 0+angle, 180); 124 graphics.setColor( Color.black); 125 graphics.fillArc( centerX-extendCircleSemi, 126 centerY-extendCircleSemi, 127 extendCircleSemi*2, 128 extendCircleSemi*2, 129 180+angle, 180); 130 graphics.fillArc( centerX+(int)(Math.cos(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi, 131 centerY-(int)(Math.sin(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi, 132 innerCircleSemi*2, 133 innerCircleSemi*2, 134 0, 135 360); 136 graphics.setColor( Color.white); 137 graphics.fillArc( centerX+(int)(Math.cos(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi/2, 138 centerY-(int)(Math.sin(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi/2, 139 innerCircleSemi, 140 innerCircleSemi, 141 0, 142 360); 143 graphics.setColor( Color.white); 144 graphics.fillArc( centerX-(int)(Math.cos(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi, 145 centerY+(int)(Math.sin(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi, 146 innerCircleSemi*2, 147 innerCircleSemi*2, 148 0, 149 360); 150 graphics.setColor( Color.black); 151 graphics.fillArc( centerX-(int)(Math.cos(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi/2, 152 centerY+(int)(Math.sin(Math.PI*angle/180)*innerCircleSemi)-innerCircleSemi/2, 153 innerCircleSemi, 154 innerCircleSemi, 155 0, 156 360); 157 } 158 }
效果如图：
