Java2实用教程（第二版）程序代码——第十八章 Java中的鼠标事件和键盘事件
1
//例子1
2import java.applet.*;import java.awt.*;
3import java.awt.event.*;
4public class Example18_1 extends Applet implements MouseListener
5
{ TextField text;
6
public void init()
7
{ text=new TextField(40); add(text);
8 addMouseListener(this) ;//向小程序增加鼠标事件监视器。
9
}
10 public void mousePressed(MouseEvent e)
11 { text.setText("鼠标键按下了,位置是"+e.getX()+","+e.getY() );
12 }
13 public void mouseReleased(MouseEvent e)
14 { text.setText(" 鼠标松开了,位置是"+e.getX()+","+e.getY() );
15 }
16 public void mouseEntered(MouseEvent e)
17 { text.setText(" 鼠标进来了,位置是"+e.getX()+","+e.getY() );
18 }
19 public void mouseExited(MouseEvent e)
20 { text.setText(" 鼠标走开了");
21 }
22 public void mouseClicked(MouseEvent e)
23 { if(e.getClickCount()==2)
24 { text.setText("鼠标键双击,位置:"+e.getX()+","+e.getY());
25 }
26 else {}
27 }
28
}
29
30//例子2
31import java.awt.*;import java.awt.event.*;
32class MyCanvas extends Canvas implements MouseListener
33{ int left=-1,right=-1; //记录左、右键用的变量。
34 int x=-1,y=-1; //记录鼠标位置用的变量。
35 MyCanvas()
36 { setSize(100,100);
37 setBackground(Color.cyan) ;
38 addMouseListener(this);
39 }
40 public void paint(Graphics g)
41 { if(left==1)
42 { g.drawOval(x-10,y-10,20,20);
43 }
44 else if(right==1)
45 { g.drawRect(x-8,y-8,16,16);
46 }
47 }
48 public void mousePressed(MouseEvent e)
49 { x=e.getX(); y=e.getY();
50 if(e.getModifiers()==InputEvent.BUTTON1_MASK)
51 { left=1;right=-1;
52 repaint();
53 }
54 else if(e.getModifiers()==InputEvent.BUTTON3_MASK)
55 { right=1; left=-1;
56 repaint();
57 }
58 }
59 public void mouseReleased(MouseEvent e){}
60 public void mouseEntered(MouseEvent e){}
61 public void mouseExited(MouseEvent e)
62 { left=-1;right=-1;
63 repaint();
64 }
65 public void mouseClicked(MouseEvent e){}
66 public void update(Graphics g)
67 { if(left==1||right==1)
68 { paint(g);
69 }
70 else
71 { super.update(g);
72 }
73 }
74}
75public class Example18_2
76{ public static void main(String args[])
77 { Frame f=new Frame();
78 f.setBounds(100,100,200,200);f.setVisible(true);
79 f.addWindowListener(new WindowAdapter() //适配器
80 {public void windowClosing(WindowEvent e)
81 {System.exit(0);
82 }
83 });
84 f.add(new MyCanvas(),BorderLayout.CENTER);//添加画布。
85 f.validate();
86 }
87}
88
89//例子3
90import java.awt.*;import java.awt.event.*;
91import java.applet.*;
92public class Example18_3 extends Applet implements MouseListener
93{ TextField text; Button button;
94 TextArea textArea;
95 public void init()
96 { text=new TextField(10); text.addMouseListener(this);
97 button=new Button("按钮"); button.addMouseListener(this);
98 addMouseListener(this);
99 textArea=new TextArea(8,28);
100 add(button);add(text);add(textArea);
101 }
102 public void mousePressed(MouseEvent e)
103 { if(e.getSource()==button)
104 {textArea.append("\n在按钮上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");
105 }
106 else if(e.getSource()==text)
107 {textArea.append("\n在文本框上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");
108 }
109 else if(e.getSource()==this)
110 {textArea.append("\n在容器上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");
111 }
112 }
113 public void mouseReleased(MouseEvent e) {}
114 public void mouseEntered(MouseEvent e) {}
115 public void mouseExited(MouseEvent e) {}
116 public void mouseClicked(MouseEvent e)
117 { if(e.getClickCount()>=2)
118 textArea.setText("鼠标连击，位置:"+"("+e.getX()+","+e.getY()+")");
119 }
120}
121
122//例子4
123import java.applet.*;import java.awt.*;import java.awt.event.*;
124public class Example18_4 extends Applet implements MouseMotionListener
125{ int x=-1,y=-1;
126 public void init()
127 { setBackground(Color.green);
128 addMouseMotionListener(this);
129 }
130 public void paint(Graphics g)
131 { if(x!=-1&&y!=-1)
132 { g.setColor(Color.red);
133 g.drawLine(x,y,x,y);
134 }
135 }
136 public void mouseDragged(MouseEvent e)
137 { x=(int)e.getX();y=(int)e.getY();
138 repaint();
139 }
140 public void mouseMoved(MouseEvent e){}
141 public void update(Graphics g)
142 { paint(g);
143 }
144}
145
146//例子5
147import java.applet.*;import java.awt.*;
148import java.awt.event.*;
149public class Example18_5 extends Applet
150implements ActionListener,MouseMotionListener
151{ int x=-1,y=-1,橡皮擦通知=0,清除通知=0;
152 Color c=new Color(255,0,0);int con=3;
153 Button b_red,b_blue,b_green,
154 清除,b_quit;
155 public void init()
156 { addMouseMotionListener(this);
157 b_red=new Button("画红色图形");
158 b_blue=new Button("兰色图形");
159 b_green=new Button("画绿色图形");
160 b_quit=new Button("橡皮");
161 清除=new Button("清除");
162 add(b_red); add(b_green); add(b_blue); add(b_quit);add(清除);
163 b_red.addActionListener(this); b_green.addActionListener(this);
164 b_blue.addActionListener(this); b_quit.addActionListener(this);
165 清除.addActionListener(this);
166 }
167 public void paint(Graphics g)
168 { if(x!=-1&&y!=-1&&橡皮擦通知==0&&清除通知==0)
169 { g.setColor(c); g.fillOval(x,y,con,con);
170 }
171 else if(橡皮擦通知==1&&清除通知==0)
172 { g.clearRect(x,y,10,10);
173 }
174 else if(清除通知==1&&橡皮擦通知==0)
175 { g.clearRect(0,0,getSize().width,getSize().height);
176 }
177 }
178 public void mouseDragged(MouseEvent e)
179 { x=(int)e.getX();y=(int)e.getY(); repaint();
180 }
181 public void mouseMoved(MouseEvent e){ }
182 public void update(Graphics g)
183 { paint(g);
184 }
185 public void actionPerformed(ActionEvent e)
186 { if(e.getSource()==b_red)
187 { 橡皮擦通知=0;清除通知=0; c=new Color(255,0,0);
188 }
189 else if(e.getSource()==b_green)
190 { 橡皮擦通知=0;清除通知=0; c=new Color(0,255,0);
191 }
192 else if(e.getSource()==b_blue)
193 { 橡皮擦通知=0;清除通知=0; c=new Color(0,0,255);
194 }
195 if(e.getSource()==b_quit)
196 { 橡皮擦通知=1;清除通知=0 ;
197 }
198 if(e.getSource()==清除)
199 { 清除通知=1; 橡皮擦通知=0;repaint();
200 }
201 }
202}
203
204//例子6
205import java.awt.*;import java.awt.event.*;import java.applet.*;
206import javax.swing.SwingUtilities;
207public class Example18_6 extends Frame implements MouseListener,MouseMotionListener
208{ Button button;
209 int x,y;
210 boolean move=false;
211 Example18_6()
212 { button=new Button("按钮");
213 button.addMouseListener(this);
214 button.addMouseMotionListener(this);
215 addMouseMotionListener(this);
216 setLayout(new FlowLayout());
217 add(button);
218 addWindowListener(new WindowAdapter()
219 { public void windowClosing(WindowEvent e)
220 { System.exit(0);
221 }
222 });
223 setBounds(10,10,200,180);
224 setVisible(true); validate();
225 }
226 public void mousePressed(MouseEvent e) {}
227 public void mouseReleased(MouseEvent e)
228 { move=false;
229 }
230 public void mouseEntered(MouseEvent e) {}
231 public void mouseExited(MouseEvent e) {}
232 public void mouseClicked(MouseEvent e){}
233 public void mouseMoved(MouseEvent e){}
234 public void mouseDragged(MouseEvent e)
235 { Button b=null;
236 if(e.getSource() instanceof Button) //在按钮上拖动鼠标导致按钮上发生鼠标事件。
237 { b=(Button)e.getSource();
238 move=true;
239 //将鼠标拖动事件转移到棋盘,导致棋盘上发生鼠标拖动事件:
240 e=SwingUtilities.convertMouseEvent(button,e,this);
241 //并将从按钮转移得到的鼠标事件e传递给mouseDragged方法的参数。
242 }
243 if(e.getSource()==this)
244 { if(move&&b!=null)
245 { x=e.getX(); y=e.getY();
246 int w=b.getSize().width,h=b.getSize().height;
247 b.setLocation(x-w/2,y-h/2);
248 }
249 }
250 }
251 public static void main(String args[])
252 { new Example18_6();
253 }
254}
255
256//例子7
257import java.applet.*;import java.awt.*;
258import java.awt.event.*;
259public class Example18_7 extends Applet implements
260KeyListener
261{ Button b[]=new Button[10];
262 int x,y;
263 public void init()
264 { for(int i=0;i<=9;i++)
265 { b[i]=new Button(""+i);
266 b[i].addKeyListener(this);
267 add(b[i]);
268 }
269 }
270 public void keyPressed(KeyEvent e)
271 { Button button=(Button)e.getSource();
272 x=button.getBounds().x;
273 y=button.getBounds().y;
274 if(e.getKeyCode()==KeyEvent.VK_UP)
275 { y=y-2;
276 if(y<=0) y=0;
277 button.setLocation(x,y);
278 }
279 else if(e.getKeyCode()==KeyEvent.VK_DOWN)
280 { y=y+2;
281 if(y>=300) y=300;
282 button.setLocation(x,y);
283 }
284 else if(e.getKeyCode()==KeyEvent.VK_LEFT)
285 { x=x-2;
286 if(x<=0) x=0;
287 button.setLocation(x,y);
288 }
289 else if(e.getKeyCode()==KeyEvent.VK_RIGHT)
290 { x=x+2;
291 if(x>=300) x=300;
292 button.setLocation(x,y);
293 }
294 }
295 public void keyTyped(KeyEvent e) {}
296 public void keyReleased(KeyEvent e) {}
297}
298
299//例子8
300import java.awt.*;import java.awt.event.*;
301//创建棋盘的类：
302class ChessPad extends Panel implements MouseListener,ActionListener
303{ int x=-1,y=-1, 棋子颜色=1; //控制棋子颜色的成员变量。
304 Button button=new Button("重新开局"); //控制重新开局的按扭。
305 TextField text_1=new TextField("请黑棋下子"),
306 text_2=new TextField(); //提示下棋的两个文本框。
307 ChessPad()
308 { setSize(440,440);
309 setLayout(null);setBackground(Color.pink);
310 addMouseListener(this);add(button);button.setBounds(10,5,60,26);
311 button.addActionListener(this);
312 add(text_1);text_1.setBounds(90,5,90,24);
313 add(text_2);text_2.setBounds(290,5,90,24);
314 text_1.setEditable(false);text_2.setEditable(false);
315 }
316 public void paint(Graphics g) //绘制围棋棋盘的外观。
317 { for(int i=40;i<=380;i=i+20)
318 { g.drawLine(40,i,400,i);
319 }
320 g.drawLine(40,400,400,400);
321 for(int j=40;j<=380;j=j+20)
322 { g.drawLine(j,40,j,400);
323 }
324 g.drawLine(400,40,400,400);
325 g.fillOval(97,97,6,6); g.fillOval(337,97,6,6);
326 g.fillOval(97,337,6,6);g.fillOval(337,337,6,6);
327 g.fillOval(217,217,6,6);
328 }
329 public void mousePressed(MouseEvent e) //当按下鼠标左键时下棋子。
330 { if(e.getModifiers()==InputEvent.BUTTON1_MASK)
331 { x=(int)e.getX();y=(int)e.getY(); //获取按下鼠标时的坐标位置。
332 ChessPoint_black chesspoint_black=new ChessPoint_black(this);
333 ChessPoint_white chesspoint_white=new ChessPoint_white(this);
334 int a=(x+10)/20,b=(y+10)/20;
335 if(x/20<2||y/20<2||x/20>19||y/20>19) //棋盘以外不下棋子。
336 {}
337 else
338 {
339 if(棋子颜色==1) //当棋子颜色是1时下黑棋子。
340 { this.add(chesspoint_black);
341 chesspoint_black.setBounds(a*20-7,b*20-7,16,16);
342 棋子颜色=棋子颜色*(-1);
343 text_2.setText("请白棋下子");
344 text_1.setText("");
345 }
346 else if(棋子颜色==-1) //当棋子颜色是-1时下白棋子。
347 { this.add(chesspoint_white);
348 chesspoint_white.setBounds(a*20-7,b*20-7,16,16);
349 棋子颜色=棋子颜色*(-1);
350 text_1.setText("请黑棋下子");
351 text_2.setText("");
352 }
353 }
354 }
355 }
356 public void mouseReleased(MouseEvent e){}
357 public void mouseEntered(MouseEvent e) {}
358 public void mouseExited(MouseEvent e) {}
359 public void mouseClicked(MouseEvent e){}
360 public void actionPerformed(ActionEvent e)
361 { this.removeAll();棋子颜色=1;
362 add(button);button.setBounds(10,5,60,26);
363 add(text_1);text_1.setBounds(90,5,90,24);
364 text_2.setText("");text_1.setText("请黑棋下子");
365 add(text_2);text_2.setBounds(290,5,90,24);
366 }
367}
368//负责创建黑色棋子的类：
369class ChessPoint_black extends Canvas implements MouseListener
370{ ChessPad chesspad=null; //棋子所在的棋盘。
371 ChessPoint_black(ChessPad p)
372 { setSize(20,20);chesspad=p; addMouseListener(this);
373 }
374 public void paint(Graphics g) //绘制棋子的大小。
375 { g.setColor(Color.black);g.fillOval(0,0,14,14);
376 }
377 public void mousePressed(MouseEvent e)
378 { if(e.getModifiers()==InputEvent.BUTTON3_MASK)
379 { chesspad.remove(this);//当用鼠标右键点击棋子时，从棋盘中去掉该棋子（悔棋）。
380 chesspad.棋子颜色=1;
381 chesspad.text_2.setText("");chesspad.text_1.setText("请黑棋下子");
382 }
383 }
384 public void mouseReleased(MouseEvent e){}
385 public void mouseEntered(MouseEvent e) {}
386 public void mouseExited(MouseEvent e) {}
387 public void mouseClicked(MouseEvent e)
388 { if(e.getClickCount()>=2)
389 chesspad.remove(this); //当用左键双击该棋子时，吃掉该棋子。
390 }
391}
392//负责创建白色棋子的类：
393class ChessPoint_white extends Canvas implements MouseListener
394{ ChessPad chesspad=null;
395 ChessPoint_white(ChessPad p)
396 { setSize(20,20);addMouseListener(this);
397 chesspad=p;
398 }
399 public void paint(Graphics g)
400 { g.setColor(Color.white);g.fillOval(0,0,14,14);
401 }
402 public void mousePressed(MouseEvent e)
403 { if(e.getModifiers()==InputEvent.BUTTON3_MASK)
404 { chesspad.remove(this);chesspad.棋子颜色=-1;
405 chesspad.text_2.setText("请白棋下子"); chesspad.text_1.setText("");
406 }
407 }
408 public void mouseReleased(MouseEvent e){}
409 public void mouseEntered(MouseEvent e) {}
410 public void mouseExited(MouseEvent e) {}
411 public void mouseClicked(MouseEvent e)
412 { if(e.getClickCount()>=2)
413 chesspad.remove(this);
414 }
415}
416public class Chess extends Frame //添加棋盘的窗口。
417{ ChessPad chesspad=new ChessPad();
418 Chess()
419 { setVisible(true);
420 setLayout(null);
421 Label label=
422 new Label("单击左键下棋子，双击吃棋子，用右键单击棋子悔棋",Label.CENTER);
423 add(label);label.setBounds(70,55,440,26);
424 label.setBackground(Color.orange);
425 add(chesspad);chesspad.setBounds(70,90,440,440);
426 addWindowListener(new WindowAdapter()
427 {public void windowClosing(WindowEvent e)
428 {System.exit(0);
429 }
430 });
431 pack();setSize(600,550);
432 }
433public static void main(String args[])
434 { Chess chess=new Chess();
435 }
436}
437
438//例子9
439import java.awt.event.*;import java.applet.*;
440import java.awt.*;
441public class Move extends.Applet implements KeyListener,ActionListener
442{ Button b_go=new Button("go"),
443 b_replay=new Button("replay");
444 Rectangle rect1,rect2,rect3;
445 int b_x=0,b_y=0;
446 public void init()
447 { b_go.addKeyListener(this);
448 b_replay.addActionListener(this);
449 setLayout(null);
450 //代表迷宫的矩形：
451 rect1=new Rectangle(20,40,200,40);
452 rect2=new Rectangle(200,40,24,240);
453 rect3=new Rectangle(200,220,100,40);
454 b_go.setBackground(Color.red); //代表走迷宫者的按扭。
455 add(b_go);b_go.setBounds(22,45,20,20);
456 b_x=b_go.getBounds().x;b_y=b_go.getBounds().y;
457 b_go.requestFocus() ;
458 add(b_replay);b_replay.setBounds(2,2,45,16);//点击重新开始的按扭。
459 }
460 public void paint(Graphics g)
461 { //画出迷宫：
462 g.setColor(Color.green);
463 g.fillRect(20,40,200,40);
464 g.setColor(Color.yellow);
465 g.fillRect(200,40,40,240);
466 g.setColor(Color.cyan);
467 g.fillRect(200,220,100,40);
468 g.drawString("出口",310,220);
469 g.setColor(Color.black);
470 g.drawString("点击红色按扭，然后用键盘上的方向键移动按扭",100,20);
471 }
472 public void keyPressed(KeyEvent e)
473 { //按键盘上的上下、左右键在迷宫中行走：
474 if((e.getKeyCode()==KeyEvent.VK_UP))
475 { //创建一个和按扭：b_go 同样大小的矩形：
476 Rectangle rect=new Rectangle(b_x,b_y,20,20);
477 //要求必须在迷宫内行走：
478 if(rect.intersects(rect1)||rect.intersects(rect2)||
479rect.intersects(rect3))
480 { b_y=b_y-2;b_go.setLocation(b_x,b_y);
481 }
482 }
483 else if(e.getKeyCode()==KeyEvent.VK_DOWN)
484 { Rectangle rect=new Rectangle(b_x,b_y,20,20);
485 if(rect.intersects(rect1)||rect.intersects(rect2)||
486rect.intersects(rect3))
487 { b_y=b_y+2;b_go.setLocation(b_x,b_y);
488 }
489 }
490 else if(e.getKeyCode()==KeyEvent.VK_LEFT)
491 { Rectangle rect=new Rectangle(b_x,b_y,20,20);
492 if(rect.intersects(rect1)||rect.intersects(rect2)
493||rect.intersects(rect3))
494 { b_x=b_x-2;b_go.setLocation(b_x,b_y);
495 }
496 }
497 else if(e.getKeyCode()==KeyEvent.VK_RIGHT)
498 { Rectangle rect=new Rectangle(b_x,b_y,20,20);
499 if(rect.intersects(rect1)||rect.intersects(rect2)||
500rect.intersects(rect3))
501 { b_x=b_x+2;b_go.setLocation(b_x,b_y);
502 }
503 }
504 }
505 public void keyReleased(KeyEvent e){}
506 public void keyTyped(KeyEvent e){}
507 public void actionPerformed(ActionEvent e)
508 { b_go.setBounds(22,45,20,20);
509 b_x=b_go.getBounds().x;b_y=b_go.getBounds().y;
510 b_go.requestFocus() ;
511 }
512}
513
514//例子10
515import java.awt.*;import java.applet.*;import java.awt.event.*;
516class People extends Button implements FocusListener //代表华容道人物的类。
517{ Rectangle rect=null;
518 int left_x,left_y;//按扭的左上角坐标.
519 int width,height; //按扭的宽和高.
520 String name; int number;
521 People(int number,String s,int x,int y,int w,int h,Hua_Rong_Road road)
522 { super(s);
523 name=s;this.number=number;
524 left_x=x;left_y=y;
525 width=w;height=h;setBackground(Color.orange);
526 road.add(this); addKeyListener(road);
527 setBounds(x,y,w,h);addFocusListener(this);
528 rect=new Rectangle(x,y,w,h);
529 }
530 public void focusGained(FocusEvent e)
531 { setBackground(Color.red);
532 }
533 public void focusLost(FocusEvent e)
534 { setBackground(Color.orange);
535 }
536}
537public class Hua_Rong_Road extends Applet implements KeyListener,ActionListener
538{ People people[]=new People[10];
539 Rectangle left,right,above ,below;//华容道的边界 .
540 Button restart=new Button("重新开始");
541 public void init()
542 { setLayout(null); add(restart);
543 restart.setBounds(5,5,80,25);
544 restart.addActionListener(this);
545 people[0]=new People(0,"曹操",104,54,100,100,this);
546 people[1]=new People(1,"关羽",104,154,100,50,this);
547 people[2]=new People(2,"张飞",54, 154,50,100,this);
548 people[3]=new People(3,"刘备",204,154,50,100,this);
549 people[4]=new People(4,"张辽",54, 54, 50,100,this);
550 people[5]=new People(5,"曹仁",204, 54, 50,100,this);
551 people[6]=new People(6,"兵 ",54,254,50,50,this);
552 people[7]=new People(7,"兵 ",204,254,50,50,this);
553 people[8]=new People(8,"兵 ",104,204,50,50,this);
554 people[9]=new People(9,"兵 ",154,204,50,50,this);
555 people[9].requestFocus();
556 left=new Rectangle(49,49,5,260);
557 people[0].setForeground(Color.white) ;
558 right=new Rectangle(254,49,5,260);
559 above=new Rectangle(49,49,210,5);
560 below=new Rectangle(49,304,210,5);
561 }
562 public void paint(Graphics g)
563 { //画出华容道的边界:
564 g.setColor(Color.cyan);
565 g.fillRect(49,49,5,260);//left.
566 g.fillRect(254,49,5,260);//right.
567 g.fillRect(49,49,210,5); //above.
568 g.fillRect(49,304,210,5);//below.
569 //提示曹操逃出位置和按键规则:
570 g.drawString("点击相应的人物,然后按键盘上的上下左右箭头移动",100,20);
571 g.setColor(Color.red);
572 g.drawString("曹操到达该位置",110,300);
573 }
574 public void keyPressed(KeyEvent e)
575 { People man=(People)e.getSource();//获取事件源.
576 man.rect.setLocation(man.getBounds().x, man.getBounds().y);
577 if(e.getKeyCode()==KeyEvent.VK_DOWN)
578 { man.left_y=man.left_y+50; //向下前进50个单位。
579 man.setLocation(man.left_x,man.left_y);
580 man.rect.setLocation(man.left_x,man.left_y);
581 //判断是否和其它人物或下边界出现重叠,如果出现重叠就退回50个单位距离。
582 for(int i=0;i<10;i++)
583 {if((man.rect.intersects(people[i].rect))&&(man.number!=i))
584 { man.left_y=man.left_y-50;
585 man.setLocation(man.left_x,man.left_y);
586 man.rect.setLocation(man.left_x,man.left_y);
587 }
588 }
589 if(man.rect.intersects(below))
590 { man.left_y=man.left_y-50;
591 man.setLocation(man.left_x,man.left_y);
592 man.rect.setLocation(man.left_x,man.left_y);
593 }
594 }
595 if(e.getKeyCode()==KeyEvent.VK_UP)
596 { man.left_y=man.left_y-50; //向上前进50个单位。
597 man.setLocation(man.left_x,man.left_y);
598 man.rect.setLocation(man.left_x,man.left_y);
599 //判断是否和其它人物或上边界出现重叠,如果出现重叠就退回50个单位距离。
600 for(int i=0;i<10;i++)
601 { if((man.rect.intersects(people[i].rect))&&(man.number!=i))
602 { man.left_y=man.left_y+50;
603 man.setLocation(man.left_x,man.left_y);
604 man.rect.setLocation(man.left_x,man.left_y);
605 }
606 }
607 if(man.rect.intersects(above))
608 { man.left_y=man.left_y+50;
609 man.setLocation(man.left_x,man.left_y);
610 man.rect.setLocation(man.left_x,man.left_y);
611 }
612 }
613 if(e.getKeyCode()==KeyEvent.VK_LEFT)
614 { man.left_x=man.left_x-50; //向左前进50个单位。
615 man.setLocation(man.left_x,man.left_y);
616 man.rect.setLocation(man.left_x,man.left_y);
617 //判断是否和其它人物或左边界出现重叠,如果出现重叠就退回50个单位距离。
618 for(int i=0;i<10;i++)
619 { if((man.rect.intersects(people[i].rect))&&(man.number!=i))
620 { man.left_x=man.left_x+50;
621 man.setLocation(man.left_x,man.left_y);
622 man.rect.setLocation(man.left_x,man.left_y);
623 }
624 }
625 if(man.rect.intersects(left))
626 { man.left_x=man.left_x+50;
627 man.setLocation(man.left_x,man.left_y);
628 man.rect.setLocation(man.left_x,man.left_y);
629 }
630 }
631 if(e.getKeyCode()==KeyEvent.VK_RIGHT)
632 { man.left_x=man.left_x+50; //向右前进50个单位。
633 man.setLocation(man.left_x,man.left_y);
634 man.rect.setLocation(man.left_x,man.left_y);
635 //判断是否和其它人物或右边界出现重叠,如果出现重叠就退回50个单位距离。
636 for(int i=0;i<10;i++)
637 { if((man.rect.intersects(people[i].rect))&&(man.number!=i))
638 { man.left_x=man.left_x-50;
639 man.setLocation(man.left_x,man.left_y);
640 man.rect.setLocation(man.left_x,man.left_y);
641 }
642 }
643 if(man.rect.intersects(right))
644 { man.left_x=man.left_x-50;
645 man.setLocation(man.left_x,man.left_y);
646 man.rect.setLocation(man.left_x,man.left_y);
647 }
648 }
649 }
650 public void keyTyped(KeyEvent e){}
651 public void keyReleased(KeyEvent e){}
652 public void actionPerformed(ActionEvent e)
653 { this.removeAll();
654 this.init();
655 }
656}
657
//例子12
import java.applet.*;import java.awt.*; 3
import java.awt.event.*;4
public class Example18_1 extends Applet implements MouseListener5
{ TextField text;
6
public void init()7
{ text=new TextField(40); add(text);
8
addMouseListener(this) ;//向小程序增加鼠标事件监视器。9
} 10
public void mousePressed(MouseEvent e)11
{ text.setText("鼠标键按下了,位置是"+e.getX()+","+e.getY() );12
} 13
public void mouseReleased(MouseEvent e)14
{ text.setText(" 鼠标松开了,位置是"+e.getX()+","+e.getY() );15
}16
public void mouseEntered(MouseEvent e)17
{ text.setText(" 鼠标进来了,位置是"+e.getX()+","+e.getY() );18
}19
public void mouseExited(MouseEvent e)20
{ text.setText(" 鼠标走开了");21
}22
public void mouseClicked(MouseEvent e)23
{ if(e.getClickCount()==2)24
{ text.setText("鼠标键双击,位置:"+e.getX()+","+e.getY());25
} 26
else {}27
}28
}29
30
//例子231
import java.awt.*;import java.awt.event.*;32
class MyCanvas extends Canvas implements MouseListener33
{ int left=-1,right=-1; //记录左、右键用的变量。 34
int x=-1,y=-1; //记录鼠标位置用的变量。35
MyCanvas()36
{ setSize(100,100);37
setBackground(Color.cyan) ;38
addMouseListener(this);39
} 40
public void paint(Graphics g)41
{ if(left==1)42
{ g.drawOval(x-10,y-10,20,20);43
}44
else if(right==1)45
{ g.drawRect(x-8,y-8,16,16);46
}47
} 48
public void mousePressed(MouseEvent e)49
{ x=e.getX(); y=e.getY();50
if(e.getModifiers()==InputEvent.BUTTON1_MASK)51
{ left=1;right=-1;52
repaint();53
}54
else if(e.getModifiers()==InputEvent.BUTTON3_MASK)55
{ right=1; left=-1;56
repaint();57
}58
} 59
public void mouseReleased(MouseEvent e){}60
public void mouseEntered(MouseEvent e){}61
public void mouseExited(MouseEvent e)62
{ left=-1;right=-1;63
repaint();64
}65
public void mouseClicked(MouseEvent e){}66
public void update(Graphics g)67
{ if(left==1||right==1)68
{ paint(g);69
}70
else71
{ super.update(g);72
}73
}74
}75
public class Example18_2 76
{ public static void main(String args[])77
{ Frame f=new Frame();78
f.setBounds(100,100,200,200);f.setVisible(true);79
f.addWindowListener(new WindowAdapter() //适配器80
{public void windowClosing(WindowEvent e)81
{System.exit(0);82
}83
});84
f.add(new MyCanvas(),BorderLayout.CENTER);//添加画布。85
f.validate(); 86
}87
}88
89
//例子390
import java.awt.*;import java.awt.event.*;91
import java.applet.*;92
public class Example18_3 extends Applet implements MouseListener 93
{ TextField text; Button button;94
TextArea textArea; 95
public void init() 96
{ text=new TextField(10); text.addMouseListener(this);97
button=new Button("按钮"); button.addMouseListener(this);98
addMouseListener(this);99
textArea=new TextArea(8,28);100
add(button);add(text);add(textArea);101
}102
public void mousePressed(MouseEvent e)103
{ if(e.getSource()==button)104
{textArea.append("\n在按钮上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");105
}106
else if(e.getSource()==text)107
{textArea.append("\n在文本框上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");108
}109
else if(e.getSource()==this)110
{textArea.append("\n在容器上鼠标按下,位置:"+"("+e.getX()+","+e.getY()+")");111
} 112
}113
public void mouseReleased(MouseEvent e) {}114
public void mouseEntered(MouseEvent e) {}115
public void mouseExited(MouseEvent e) {}116
public void mouseClicked(MouseEvent e) 117
{ if(e.getClickCount()>=2)118
textArea.setText("鼠标连击，位置:"+"("+e.getX()+","+e.getY()+")");119
}120
}121
122
//例子4 123
import java.applet.*;import java.awt.*;import java.awt.event.*;124
public class Example18_4 extends Applet implements MouseMotionListener125
{ int x=-1,y=-1;126
public void init()127
{ setBackground(Color.green);128
addMouseMotionListener(this); 129
}130
public void paint(Graphics g)131
{ if(x!=-1&&y!=-1)132
{ g.setColor(Color.red);133
g.drawLine(x,y,x,y);134
}135
}136
public void mouseDragged(MouseEvent e)137
{ x=(int)e.getX();y=(int)e.getY();138
repaint();139
}140
public void mouseMoved(MouseEvent e){} 141
public void update(Graphics g)142
{ paint(g);143
} 144
}145
146
//例子5 147
import java.applet.*;import java.awt.*;148
import java.awt.event.*;149
public class Example18_5 extends Applet150
implements ActionListener,MouseMotionListener151
{ int x=-1,y=-1,橡皮擦通知=0,清除通知=0;152
Color c=new Color(255,0,0);int con=3;153
Button b_red,b_blue,b_green,154
清除,b_quit;155
public void init()156
{ addMouseMotionListener(this); 157
b_red=new Button("画红色图形"); 158
b_blue=new Button("兰色图形"); 159
b_green=new Button("画绿色图形"); 160
b_quit=new Button("橡皮");161
清除=new Button("清除");162
add(b_red); add(b_green); add(b_blue); add(b_quit);add(清除);163
b_red.addActionListener(this); b_green.addActionListener(this);164
b_blue.addActionListener(this); b_quit.addActionListener(this);165
清除.addActionListener(this);166
}167
public void paint(Graphics g)168
{ if(x!=-1&&y!=-1&&橡皮擦通知==0&&清除通知==0)169
{ g.setColor(c); g.fillOval(x,y,con,con);170
}171
else if(橡皮擦通知==1&&清除通知==0)172
{ g.clearRect(x,y,10,10);173
}174
else if(清除通知==1&&橡皮擦通知==0)175
{ g.clearRect(0,0,getSize().width,getSize().height);176
}177
}178
public void mouseDragged(MouseEvent e)179
{ x=(int)e.getX();y=(int)e.getY(); repaint();180
}181
public void mouseMoved(MouseEvent e){ } 182
public void update(Graphics g)183
{ paint(g);184
} 185
public void actionPerformed(ActionEvent e)186
{ if(e.getSource()==b_red)187
{ 橡皮擦通知=0;清除通知=0; c=new Color(255,0,0);188
}189
else if(e.getSource()==b_green)190
{ 橡皮擦通知=0;清除通知=0; c=new Color(0,255,0);191
}192
else if(e.getSource()==b_blue)193
{ 橡皮擦通知=0;清除通知=0; c=new Color(0,0,255);194
}195
if(e.getSource()==b_quit)196
{ 橡皮擦通知=1;清除通知=0 ;197
}198
if(e.getSource()==清除)199
{ 清除通知=1; 橡皮擦通知=0;repaint();200
}201
}202
}203
204
//例子6205
import java.awt.*;import java.awt.event.*;import java.applet.*; 206
import javax.swing.SwingUtilities;207
public class Example18_6 extends Frame implements MouseListener,MouseMotionListener208
{ Button button;209
int x,y;210
boolean move=false;211
Example18_6()212
{ button=new Button("按钮"); 213
button.addMouseListener(this);214
button.addMouseMotionListener(this);215
addMouseMotionListener(this);216
setLayout(new FlowLayout());217
add(button);218
addWindowListener(new WindowAdapter()219
{ public void windowClosing(WindowEvent e)220
{ System.exit(0);221
}222
});223
setBounds(10,10,200,180);224
setVisible(true); validate();225
}226
public void mousePressed(MouseEvent e) {}227
public void mouseReleased(MouseEvent e)228
{ move=false;229
}230
public void mouseEntered(MouseEvent e) {}231
public void mouseExited(MouseEvent e) {}232
public void mouseClicked(MouseEvent e){}233
public void mouseMoved(MouseEvent e){} 234
public void mouseDragged(MouseEvent e)235
{ Button b=null;236
if(e.getSource() instanceof Button) //在按钮上拖动鼠标导致按钮上发生鼠标事件。237
{ b=(Button)e.getSource(); 238
move=true; 239
//将鼠标拖动事件转移到棋盘,导致棋盘上发生鼠标拖动事件:240
e=SwingUtilities.convertMouseEvent(button,e,this);241
//并将从按钮转移得到的鼠标事件e传递给mouseDragged方法的参数。242
}243
if(e.getSource()==this)244
{ if(move&&b!=null)245
{ x=e.getX(); y=e.getY();246
int w=b.getSize().width,h=b.getSize().height;247
b.setLocation(x-w/2,y-h/2);248
}249
}250
}251
public static void main(String args[])252
{ new Example18_6();253
}254
}255
256
//例子7257
import java.applet.*;import java.awt.*;258
import java.awt.event.*;259
public class Example18_7 extends Applet implements260
KeyListener261
{ Button b[]=new Button[10];262
int x,y;263
public void init()264
{ for(int i=0;i<=9;i++) 265
{ b[i]=new Button(""+i);266
b[i].addKeyListener(this);267
add(b[i]);268
}269
}270
public void keyPressed(KeyEvent e)271
{ Button button=(Button)e.getSource();272
x=button.getBounds().x;273
y=button.getBounds().y;274
if(e.getKeyCode()==KeyEvent.VK_UP)275
{ y=y-2;276
if(y<=0) y=0;277
button.setLocation(x,y);278
}279
else if(e.getKeyCode()==KeyEvent.VK_DOWN)280
{ y=y+2;281
if(y>=300) y=300; 282
button.setLocation(x,y);283
}284
else if(e.getKeyCode()==KeyEvent.VK_LEFT)285
{ x=x-2;286
if(x<=0) x=0;287
button.setLocation(x,y);288
} 289
else if(e.getKeyCode()==KeyEvent.VK_RIGHT)290
{ x=x+2;291
if(x>=300) x=300;292
button.setLocation(x,y);293
}294
}295
public void keyTyped(KeyEvent e) {}296
public void keyReleased(KeyEvent e) {}297
}298
299
//例子8300
import java.awt.*;import java.awt.event.*;301
//创建棋盘的类：302
class ChessPad extends Panel implements MouseListener,ActionListener303
{ int x=-1,y=-1, 棋子颜色=1; //控制棋子颜色的成员变量。304
Button button=new Button("重新开局"); //控制重新开局的按扭。305
TextField text_1=new TextField("请黑棋下子"),306
text_2=new TextField(); //提示下棋的两个文本框。307
ChessPad()308
{ setSize(440,440);309
setLayout(null);setBackground(Color.pink);310
addMouseListener(this);add(button);button.setBounds(10,5,60,26);311
button.addActionListener(this);312
add(text_1);text_1.setBounds(90,5,90,24);313
add(text_2);text_2.setBounds(290,5,90,24);314
text_1.setEditable(false);text_2.setEditable(false);315
}316
public void paint(Graphics g) //绘制围棋棋盘的外观。317
{ for(int i=40;i<=380;i=i+20)318
{ g.drawLine(40,i,400,i);319
}320
g.drawLine(40,400,400,400);321
for(int j=40;j<=380;j=j+20)322
{ g.drawLine(j,40,j,400);323
}324
g.drawLine(400,40,400,400); 325
g.fillOval(97,97,6,6); g.fillOval(337,97,6,6);326
g.fillOval(97,337,6,6);g.fillOval(337,337,6,6);327
g.fillOval(217,217,6,6);328
}329
public void mousePressed(MouseEvent e) //当按下鼠标左键时下棋子。330
{ if(e.getModifiers()==InputEvent.BUTTON1_MASK)331
{ x=(int)e.getX();y=(int)e.getY(); //获取按下鼠标时的坐标位置。332
ChessPoint_black chesspoint_black=new ChessPoint_black(this);333
ChessPoint_white chesspoint_white=new ChessPoint_white(this);334
int a=(x+10)/20,b=(y+10)/20;335
if(x/20<2||y/20<2||x/20>19||y/20>19) //棋盘以外不下棋子。336
{}337
else338
{ 339
if(棋子颜色==1) //当棋子颜色是1时下黑棋子。340
{ this.add(chesspoint_black);341
chesspoint_black.setBounds(a*20-7,b*20-7,16,16);342
棋子颜色=棋子颜色*(-1); 343
text_2.setText("请白棋下子");344
text_1.setText("");345
}346
else if(棋子颜色==-1) //当棋子颜色是-1时下白棋子。347
{ this.add(chesspoint_white);348
chesspoint_white.setBounds(a*20-7,b*20-7,16,16);349
棋子颜色=棋子颜色*(-1);350
text_1.setText("请黑棋下子");351
text_2.setText("");352
}353
}354
}355
}356
public void mouseReleased(MouseEvent e){}357
public void mouseEntered(MouseEvent e) {}358
public void mouseExited(MouseEvent e) {}359
public void mouseClicked(MouseEvent e){}360
public void actionPerformed(ActionEvent e)361
{ this.removeAll();棋子颜色=1;362
add(button);button.setBounds(10,5,60,26);363
add(text_1);text_1.setBounds(90,5,90,24); 364
text_2.setText("");text_1.setText("请黑棋下子");365
add(text_2);text_2.setBounds(290,5,90,24);366
}367
}368
//负责创建黑色棋子的类：369
class ChessPoint_black extends Canvas implements MouseListener370
{ ChessPad chesspad=null; //棋子所在的棋盘。371
ChessPoint_black(ChessPad p)372
{ setSize(20,20);chesspad=p; addMouseListener(this);373
}374
public void paint(Graphics g) //绘制棋子的大小。375
{ g.setColor(Color.black);g.fillOval(0,0,14,14);376
} 377
public void mousePressed(MouseEvent e) 378
{ if(e.getModifiers()==InputEvent.BUTTON3_MASK)379
{ chesspad.remove(this);//当用鼠标右键点击棋子时，从棋盘中去掉该棋子（悔棋）。380
chesspad.棋子颜色=1;381
chesspad.text_2.setText("");chesspad.text_1.setText("请黑棋下子");382
}383
}384
public void mouseReleased(MouseEvent e){}385
public void mouseEntered(MouseEvent e) {}386
public void mouseExited(MouseEvent e) {}387
public void mouseClicked(MouseEvent e)388
{ if(e.getClickCount()>=2)389
chesspad.remove(this); //当用左键双击该棋子时，吃掉该棋子。390
}391
}392
//负责创建白色棋子的类：393
class ChessPoint_white extends Canvas implements MouseListener394
{ ChessPad chesspad=null;395
ChessPoint_white(ChessPad p)396
{ setSize(20,20);addMouseListener(this);397
chesspad=p; 398
}399
public void paint(Graphics g)400
{ g.setColor(Color.white);g.fillOval(0,0,14,14); 401
} 402
public void mousePressed(MouseEvent e)403
{ if(e.getModifiers()==InputEvent.BUTTON3_MASK)404
{ chesspad.remove(this);chesspad.棋子颜色=-1;405
chesspad.text_2.setText("请白棋下子"); chesspad.text_1.setText("");406
}407
}408
public void mouseReleased(MouseEvent e){}409
public void mouseEntered(MouseEvent e) {}410
public void mouseExited(MouseEvent e) {}411
public void mouseClicked(MouseEvent e)412
{ if(e.getClickCount()>=2)413
chesspad.remove(this);414
}415
}416
public class Chess extends Frame //添加棋盘的窗口。417
{ ChessPad chesspad=new ChessPad();418
Chess()419
{ setVisible(true);420
setLayout(null);421
Label label=422
new Label("单击左键下棋子，双击吃棋子，用右键单击棋子悔棋",Label.CENTER);423
add(label);label.setBounds(70,55,440,26);424
label.setBackground(Color.orange); 425
add(chesspad);chesspad.setBounds(70,90,440,440);426
addWindowListener(new WindowAdapter()427
{public void windowClosing(WindowEvent e)428
{System.exit(0);429
}430
});431
pack();setSize(600,550);432
}433
public static void main(String args[])434
{ Chess chess=new Chess();435
}436
}437
438
//例子9439
import java.awt.event.*;import java.applet.*;440
import java.awt.*;441
public class Move extends.Applet implements KeyListener,ActionListener442
{ Button b_go=new Button("go"),443
b_replay=new Button("replay");444
Rectangle rect1,rect2,rect3;445
int b_x=0,b_y=0;446
public void init()447
{ b_go.addKeyListener(this);448
b_replay.addActionListener(this);449
setLayout(null);450
//代表迷宫的矩形：451
rect1=new Rectangle(20,40,200,40);452
rect2=new Rectangle(200,40,24,240);453
rect3=new Rectangle(200,220,100,40);454
b_go.setBackground(Color.red); //代表走迷宫者的按扭。 455
add(b_go);b_go.setBounds(22,45,20,20);456
b_x=b_go.getBounds().x;b_y=b_go.getBounds().y;457
b_go.requestFocus() ;458
add(b_replay);b_replay.setBounds(2,2,45,16);//点击重新开始的按扭。 459
}460
public void paint(Graphics g)461
{ //画出迷宫：462
g.setColor(Color.green);463
g.fillRect(20,40,200,40);464
g.setColor(Color.yellow);465
g.fillRect(200,40,40,240);466
g.setColor(Color.cyan);467
g.fillRect(200,220,100,40);468
g.drawString("出口",310,220);469
g.setColor(Color.black);470
g.drawString("点击红色按扭，然后用键盘上的方向键移动按扭",100,20);471
}472
public void keyPressed(KeyEvent e)473
{ //按键盘上的上下、左右键在迷宫中行走：474
if((e.getKeyCode()==KeyEvent.VK_UP))475
{ //创建一个和按扭：b_go 同样大小的矩形：476
Rectangle rect=new Rectangle(b_x,b_y,20,20);477
//要求必须在迷宫内行走：478
if(rect.intersects(rect1)||rect.intersects(rect2)||479
rect.intersects(rect3))480
{ b_y=b_y-2;b_go.setLocation(b_x,b_y);481
}482
}483
else if(e.getKeyCode()==KeyEvent.VK_DOWN)484
{ Rectangle rect=new Rectangle(b_x,b_y,20,20);485
if(rect.intersects(rect1)||rect.intersects(rect2)||486
rect.intersects(rect3))487
{ b_y=b_y+2;b_go.setLocation(b_x,b_y);488
}489
}490
else if(e.getKeyCode()==KeyEvent.VK_LEFT)491
{ Rectangle rect=new Rectangle(b_x,b_y,20,20);492
if(rect.intersects(rect1)||rect.intersects(rect2)493
||rect.intersects(rect3))494
{ b_x=b_x-2;b_go.setLocation(b_x,b_y);495
} 496
} 497
else if(e.getKeyCode()==KeyEvent.VK_RIGHT)498
{ Rectangle rect=new Rectangle(b_x,b_y,20,20);499
if(rect.intersects(rect1)||rect.intersects(rect2)||500
rect.intersects(rect3))501
{ b_x=b_x+2;b_go.setLocation(b_x,b_y);502
}503
}504
}505
public void keyReleased(KeyEvent e){}506
public void keyTyped(KeyEvent e){}507
public void actionPerformed(ActionEvent e)508
{ b_go.setBounds(22,45,20,20); 509
b_x=b_go.getBounds().x;b_y=b_go.getBounds().y;510
b_go.requestFocus() ;511
} 512
}513
514
//例子10515
import java.awt.*;import java.applet.*;import java.awt.event.*;516
class People extends Button implements FocusListener //代表华容道人物的类。517
{ Rectangle rect=null;518
int left_x,left_y;//按扭的左上角坐标.519
int width,height; //按扭的宽和高.520
String name; int number;521
People(int number,String s,int x,int y,int w,int h,Hua_Rong_Road road)522
{ super(s);523
name=s;this.number=number;524
left_x=x;left_y=y;525
width=w;height=h;setBackground(Color.orange);526
road.add(this); addKeyListener(road);527
setBounds(x,y,w,h);addFocusListener(this);528
rect=new Rectangle(x,y,w,h);529
}530
public void focusGained(FocusEvent e)531
{ setBackground(Color.red);532
}533
public void focusLost(FocusEvent e)534
{ setBackground(Color.orange);535
}536
}537
public class Hua_Rong_Road extends Applet implements KeyListener,ActionListener538
{ People people[]=new People[10];539
Rectangle left,right,above ,below;//华容道的边界 .540
Button restart=new Button("重新开始"); 541
public void init()542
{ setLayout(null); add(restart);543
restart.setBounds(5,5,80,25);544
restart.addActionListener(this);545
people[0]=new People(0,"曹操",104,54,100,100,this); 546
people[1]=new People(1,"关羽",104,154,100,50,this); 547
people[2]=new People(2,"张飞",54, 154,50,100,this); 548
people[3]=new People(3,"刘备",204,154,50,100,this); 549
people[4]=new People(4,"张辽",54, 54, 50,100,this); 550
people[5]=new People(5,"曹仁",204, 54, 50,100,this); 551
people[6]=new People(6,"兵 ",54,254,50,50,this); 552
people[7]=new People(7,"兵 ",204,254,50,50,this); 553
people[8]=new People(8,"兵 ",104,204,50,50,this); 554
people[9]=new People(9,"兵 ",154,204,50,50,this); 555
people[9].requestFocus();556
left=new Rectangle(49,49,5,260);557
people[0].setForeground(Color.white) ; 558
right=new Rectangle(254,49,5,260);559
above=new Rectangle(49,49,210,5);560
below=new Rectangle(49,304,210,5);561
}562
public void paint(Graphics g)563
{ //画出华容道的边界:564
g.setColor(Color.cyan);565
g.fillRect(49,49,5,260);//left.566
g.fillRect(254,49,5,260);//right.567
g.fillRect(49,49,210,5); //above.568
g.fillRect(49,304,210,5);//below.569
//提示曹操逃出位置和按键规则:570
g.drawString("点击相应的人物,然后按键盘上的上下左右箭头移动",100,20);571
g.setColor(Color.red);572
g.drawString("曹操到达该位置",110,300);573
}574
public void keyPressed(KeyEvent e) 575
{ People man=(People)e.getSource();//获取事件源.576
man.rect.setLocation(man.getBounds().x, man.getBounds().y);577
if(e.getKeyCode()==KeyEvent.VK_DOWN)578
{ man.left_y=man.left_y+50; //向下前进50个单位。579
man.setLocation(man.left_x,man.left_y);580
man.rect.setLocation(man.left_x,man.left_y);581
//判断是否和其它人物或下边界出现重叠,如果出现重叠就退回50个单位距离。 582
for(int i=0;i<10;i++)583
{if((man.rect.intersects(people[i].rect))&&(man.number!=i))584
{ man.left_y=man.left_y-50;585
man.setLocation(man.left_x,man.left_y);586
man.rect.setLocation(man.left_x,man.left_y); 587
}588
}589
if(man.rect.intersects(below))590
{ man.left_y=man.left_y-50;591
man.setLocation(man.left_x,man.left_y);592
man.rect.setLocation(man.left_x,man.left_y); 593
} 594
}595
if(e.getKeyCode()==KeyEvent.VK_UP)596
{ man.left_y=man.left_y-50; //向上前进50个单位。597
man.setLocation(man.left_x,man.left_y);598
man.rect.setLocation(man.left_x,man.left_y);599
//判断是否和其它人物或上边界出现重叠,如果出现重叠就退回50个单位距离。 600
for(int i=0;i<10;i++)601
{ if((man.rect.intersects(people[i].rect))&&(man.number!=i))602
{ man.left_y=man.left_y+50;603
man.setLocation(man.left_x,man.left_y);604
man.rect.setLocation(man.left_x,man.left_y); 605
}606
}607
if(man.rect.intersects(above))608
{ man.left_y=man.left_y+50;609
man.setLocation(man.left_x,man.left_y);610
man.rect.setLocation(man.left_x,man.left_y); 611
} 612
}613
if(e.getKeyCode()==KeyEvent.VK_LEFT)614
{ man.left_x=man.left_x-50; //向左前进50个单位。615
man.setLocation(man.left_x,man.left_y);616
man.rect.setLocation(man.left_x,man.left_y);617
//判断是否和其它人物或左边界出现重叠,如果出现重叠就退回50个单位距离。618
for(int i=0;i<10;i++)619
{ if((man.rect.intersects(people[i].rect))&&(man.number!=i))620
{ man.left_x=man.left_x+50;621
man.setLocation(man.left_x,man.left_y);622
man.rect.setLocation(man.left_x,man.left_y); 623
}624
}625
if(man.rect.intersects(left))626
{ man.left_x=man.left_x+50;627
man.setLocation(man.left_x,man.left_y);628
man.rect.setLocation(man.left_x,man.left_y); 629
} 630
}631
if(e.getKeyCode()==KeyEvent.VK_RIGHT)632
{ man.left_x=man.left_x+50; //向右前进50个单位。633
man.setLocation(man.left_x,man.left_y);634
man.rect.setLocation(man.left_x,man.left_y);635
//判断是否和其它人物或右边界出现重叠,如果出现重叠就退回50个单位距离。636
for(int i=0;i<10;i++)637
{ if((man.rect.intersects(people[i].rect))&&(man.number!=i))638
{ man.left_x=man.left_x-50;639
man.setLocation(man.left_x,man.left_y);640
man.rect.setLocation(man.left_x,man.left_y); 641
}642
}643
if(man.rect.intersects(right))644
{ man.left_x=man.left_x-50;645
man.setLocation(man.left_x,man.left_y);646
man.rect.setLocation(man.left_x,man.left_y); 647
} 648
}649
}650
public void keyTyped(KeyEvent e){}651
public void keyReleased(KeyEvent e){}652
public void actionPerformed(ActionEvent e)653
{ this.removeAll();654
this.init();655
} 656
}657
