test.java

用midp1.0简单的实现了玩家移动碰撞和滚屏。十分适合初学者

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.lcdui.*;
public class test extends MIDlet {
 public test() {
  Display.getDisplay(this).setCurrent(new move());
 }
 protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
 }
 protected void pauseApp() {
 }
 protected void startApp() throws MIDletStateChangeException {
 }
}
class move extends Canvas implements Runnable{
 int px=0,py=0,x=0,y=0;
 public move(){
  new Thread(this).start();
 }
 public void paint(Graphics g){
  g.setColor(255,255,255);
  g.fillRect(0, 0, getWidth(), getHeight());
  g.setColor(187,122,28);
  g.fillRect(x, y, 360, 360);
  g.setColor(26,89,66);
  g.fillRect(px,py,60,60);
  g.setColor(100,38,211);
  g.drawLine(x, y, x+360, y+360);
  g.drawLine(x+360, y, x, y+360);
  g.drawLine(x, y+180, x+360, y+180);
  g.drawLine(x+180, y, x+180, y+360);
  g.drawRect(x+150,y+150,60,60);//画地图正中央的阻挡物
 }
 public void logic(){
  if(px>getWidth()/2-30 && x>(getWidth()-360)){
   px=getWidth()/2-30;
   x-=2;
  }else if(px<getWidth()/2-30 && x<0){
   px=getWidth()/2-30;
   x+=2;
   }
  if(py>getHeight()/2-30 && y>getHeight()-360){
   py=getHeight()/2-30;
   y-=2;
  }else if(py<getHeight()/2-30 && y<0){
   py=getHeight()/2-30;
   y+=2;
  }
  if(px<0)px=0;else if(px>(getWidth()-60))px=(getWidth()-60);
  if(py<0)py=0;else if(py>(getHeight()-60))py=(getHeight()-60);
/*  if(x<(getWidth()-360))x=(getWidth()-360);else if(x>0)x=0;
  if(y<(getHeight()-360))y=(getHeight()-360);else if(y>0)y=0;*/
 }
 public void keyPressed(int keyCode){
  switch(keyCode){
  case -1:
   if(py<=y+90||py>y+210||px<=x+90||px>=x+210)
   py-=2;
   break;
  case -2:
   if(py<y+90||py>=y+210||px<=x+90||px>=x+210)
   py+=2;
   break;
  case -3:
   if(px<=x+90||px>x+210||py<=y+90||py>=y+210)
   px-=2;
   break;
  case -4:
   if(px<x+90||px>=x+210||py<=y+90||py>=y+210)
   px+=2;
   break;   
  }
 }
 public void keyRepeated(int keyCode){
  switch(keyCode){
  case -1:
   if(py<=y+90||py>y+210||px<=x+90||px>=x+210)
   py-=2;
   break;
  case -2:
   if(py<y+90||py>=y+210||px<=x+90||px>=x+210)
   py+=2;
   break;
  case -3:
   if(px<=x+90||px>x+210||py<=y+90||py>=y+210)
   px-=2;
   break;
  case -4:
   if(px<x+90||px>=x+210||py<=y+90||py>=y+210)
   px+=2;
   break;   
  }
 }
 public void run(){
  while(true){
  logic();
  repaint();
  }
 }
}