数据结构课程设计——池塘夜将彩色雨（Java模拟）

import java.awt.*; import java.awt.event.*; import java.util.Random; import javax.swing.*; public class rainCanvas extends Canvas implements ActionListener,Runnable,MouseListener,MouseMotionListener { private Rain rains[]; int x0,y0; int k=0; private Thread timer; public rainCanvas() { Color colors[]={Color.BLUE,Color.green,Color.white,Color.red,Color.orange,Color.yellow,Color.pink}; Random a=new Random(); this.rains=new Rain[150]; for(int i=0;i<rains.length;i++) { Random x=new Random(); Random y=new Random(); rains[i]=new Rain(x.nextInt(700),y.nextInt(600),colors[a.nextInt(colors.length)],10); } this.addMouseListener(this); this.addMouseMotionListener(this); timer=new Thread(this); timer.start(); } private static class Rain { int x,y,r; Color color; boolean up,left; Rain(int x,int y,Color color,int r) { this.x=x; this.y=y; this.color=color; this.r=r; up=left=false; } } public void paint(Graphics g) { g.setColor(Color.darkGray); g.fillRect(0, 500, 700,200); for (int i=0; i<rains.length; i++) { g.setColor(rains[i].color); if (rains[i].x<=0 || rains[i].x>=700) //到水平边更改方向 rains[i].x=10; else rains[i].x+=20; if (rains[i].y<=0 || rains[i].y>=600) //到垂直边更改方向 rains[i].y=10; else rains[i].y+=20; Random le=new Random(); int l=le.nextInt(30)+10; g.drawLine( rains[i].x, rains[i].y, rains[i].x+x0/l, rains[i].y+y0/l); int p=0; for (int j=0; j<10; j++) { g.setColor(rains[j].color); for (int m=0;k<=50&&m<=18;m++) { g.drawOval(p*20+k*10+30*m,535+j*20,30,20); if(k*10+30*m>670) k=0; } g.setColor(this.getBackground()); g.fillRect(0, 550+j*20,700, 15); p++; } } ImageIcon img=new ImageIcon("Pic/d.gif"); this.setBackground(Color.black); g.drawImage(img.getImage(), 300, 400, this); k++; for (int i=0; i<4; i++) { Random co=new Random(); g.setColor(rains[co.nextInt(rains.length)].color); Random a1=new Random(); int a=a1.nextInt(700); Random b1=new Random(); int b=b1.nextInt(300)+400; Random r=new Random(); int c=r.nextInt(80)+80; g.drawOval(a+c/8, b+c/8, 4*c/5,4*c/5); try { timer.sleep(50); } catch (InterruptedException e) { e.printStackTrace(); } g.drawOval(a, b, c,c); } } public void actionPerformed(ActionEvent e) { repaint(); } public void run() { while(true) { repaint(); try { timer.sleep(50); } catch (InterruptedException e) { break; } } } @Override public void mouseClicked(java.awt.event.MouseEvent e) { // TODO Auto-generated method stub x0=e.getX(); y0 = e.getY(); } @Override public void mousePressed(java.awt.event.MouseEvent e) { } @Override public void mouseReleased(java.awt.event.MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseEntered(java.awt.event.MouseEvent e) { //x0=e.getX(); //y0 = e.getY(); } @Override public void mouseExited(java.awt.event.MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseDragged(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseMoved(MouseEvent e) { // TODO Auto-generated method stub //x0=e.getX(); // y0 = e.getY(); } }