import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class Midlet extends MIDlet{
public void startApp() {
Display.getDisplay(this).setCurrent(newcv(this));
}
public void pauseApp() {}
public void destroyApp(boolean unconditional) {}
}

import javax.microedition.lcdui.*;
public class cv extends Canvas{
String[] s={"play","help","score","exit"};
int w, h, fh, in=0, mo=0; Midlet m;
Font f=Font.getDefaultFont();
public cv(Midlet m){
this.m=m;
setFullScreenMode(true);
w=getWidth();
h=getHeight();
fh=f.getHeight();
}
public void paint(Graphics g){
g.setColor(0);
g.fillRect(0,0,w,h);
g.setColor(0xf0f0f0);
switch(mo){
case0:
//ve menu
//ve index
g.fillRect(0, (h-fh*4)/2+in*fh,w,fh);
for(int i=0;i< s.length;i++){
if(i==in){
g.setColor(0);
}else{
g.setColor(0xf0f0f0);
}
g.drawString(s[i],w/2,(h-fh*4)/2+i*fh,Graphics.HCENTER|Graphics.TOP);
}
break;
case1:
//ve play
g.drawString(s[0],w/2,h/2,Graphics.BASELINE|Graphics.HCENTER);
break;
case2:
//ve help
g.drawString(s[1],w/2,h/2,Graphics.BASELINE|Graphics.HCENTER);
break;
case3:
//ve about
g.drawString(smenu[2],w/2,h/2,Graphics.BASELINE|Graphics.HCENTER);
break;
case4:
//ve score
g.drawString(s[3],w/2,h/2,Graphics.BASELINE|Graphics.HCENTER);
break;
}
//ve cac lenh
g.setColor(0xf0f0f0);
g.drawString("exit",0,h,Graphics.LEFT|Graphics.BOTTOM);
g.drawString("back",w,h,Graphics.RIGHT|Graphics.BOTTOM);
repaint();
}
public void keyPressed(int k){
//di chuyen index khi nhan phim
if(k==-1)in--;
if(k==-2)in++;
if(in< 0)in=s.length-1;
if(in==s.length)in=0;
//lua chon menu se ve tuong ung
if(k==-5){
if (in==s.length-1)m.notifyDestroyed();
mo=in+1;
}
//lenh exit va back
if(k==-7)mo=0;
if(k==-6)m.notifyDestroyed();
}
}