java Me中的按键和触屏实例(4)

{

if(arg0==exit)

plane.close();

else if(arg0==start)

{

if(!key_event)

{

key_event=true;

this.removeCommand(start);

this.addCommand(over);

}

}

else if(arg0==over)

{

if(key_event)

{

  key_event=false;

  this.removeCommand(over);

  this.addCommand(start);

}

}

else if(arg0==point)

{

if(point_event)

point_event=false;   

else

point_event=true;

}

else if(arg0==trante)

{

if(point_event)

trante_event=false;