课件五程序(更改).doc

import javax.microedition.midlet.MIDlet;import javax.microedition.midlet.MIDletStateChangeException;import javax.microedition.lcdui.*;public class GameActionCanvas extends MIDlet Display dis;GameActionCanvas33 mc;public void GameActionCanva() / TODO Auto-generated constructor stubprotected void destroyApp(boolean arg0) throws MIDletStateChangeException / TODO Auto-generated method stubprotected void pauseApp() / TODO Auto-generated method stubprotected void startApp() throws MIDletStateChangeException / TODO Auto-generated method stub dis=Display.getDisplay(this); mc= new GameActionCanvas33(); dis.setCurrent(mc);public class GameActionCanvas33 extends Canvas String promote=这是什么; int cx,cy; public GameActionCanvas33() super();cx=getWidth()/2;cy=getHeight()/2; public void paint(Graphics g) g.setColor(255,255,255); g.fillRect(0,0,getWidth(),getHeight(); g.setColor(0,0,0); g.fillArc(cx,cy,30,30,0,360); g.drawString(promote,10,20,Graphics.TOP|Graphics.LEFT); protected void keyPressed(int keycode) if(keycode=getKeyCode(Canvas.UP) if(cy20)cy-=20; if(keycode=getKeyCode(Canvas.DOWN) if(cy20)cx-=20; if(keycode=getKeyCode(Canvas.RIGHT) if(cxthis.getWidth()-20)cx+=20; promote=getKeyValue(keycode); repaint() ; protected void keyReleased(int keycode) public String getKeyValue(int keycode) String nKey=非数字键; String Action=未知游戏动作; if(keycode=Canvas.KEY_NUM0)nKey=数字键 0 ; if(keycode=Canvas.KEY_NUM1)nKey=数字键 1 ; if(keycode=Canvas.KEY_NUM2)nKey=数字键 2 ; if(keycode=Canvas.KEY_NUM3)nKey=数字键 3 ; if(keycode=Canvas.KEY_NUM4)nKey=数字键 4 ; if(keycode=Canvas.KEY_NUM5)nKey=数字键 5 ; if(keycode=Canvas.KEY_NUM6)nKey=数字键 6 ; if(keycode=Canvas.KEY_NUM7)nKey=数字键 7 ; if(keycode=Canvas.KEY_NUM8)nKey=数字键 8 ; if(keycode=Canvas.KEY_NUM9)nKey=数字键 9 ; if(keycode=Canvas.KEY_STAR)nKey=键 * ; if(keycode=Canvas.KEY_POUND)nKey=键 # ; switch(getGameAction(keycode) case Canvas.UP: Action=游戏动作 向上 ;break; case Canvas.DOWN: Action=游戏动作 向下 ;break; case Canvas.LEFT: Action=游戏动作 向左 ;break; case Canvas.RIGHT: Action=游戏动作 向右 ;break