On Jan 13, 4:06 am, Travers<tna...@gmail.com> wrote:
I don't think you understand the Java API you are using. You will not get the results you want until you understand what you are playing with.
Timer() spawns a thread and returns _instantly_ thus btnRoll() ends before the TimerTask is even executed. Timer is not "synchronous"--it does not wait for the tasks to finish.
But I also think you have structured your program poorly. For event-driven GUI programs, especially games, you have to give up "Do A then do B" structure.
But if you want to make sure btnRoll()'s Timer task thread finishes first, you should add code in btnRoll to _wait_ for the Timer task to finish.
Thanks for your help, I think I have solved the synchronous problem. I
have added an Object lock to do the syn.
public void btnRoll(){
final Timer timer = new Timer();
final int index = turn - 1;
boolean snakeEyes = false;
dice1 = (int)(Math.random() * 6 + 1);
dice2 = (int)(Math.random() * 6 + 1);
if(dice1 == dice2) {
snakeEyes = true;
rolled = false;
}
if(snakeEyes == true){
tempFlagPlayer = true;
}else{
tempFlagPlayer = false;
}
timer.schedule(new TimerTask(){
private int diceSum = dice1 + dice2;
public void run(){
synchronized(lock) {
if (diceSum> 0){
movePlayer(players.get(index), tempFlagPlayer); // move player
one space each time
diceSum --;
repaint();
}else{
checkPlayerMovedStatus(players,tempFlagPlayer);
propertymanager.CheckProperty(turn,
players.get(index).getPosition());
lock.notify();
rolled = true;
timer.cancel();
}
repaint();
}
}
}, 100L,100L);
repaint();
}
and in AIturn(int tempNumOfPlayers){
public void AIturn(int tempNumOfPlayers){
btnRoll();
synchronized(lock) {
if(!rolled){
try{
lock.wait();
}
catch(InterruptedException e){}
}
if(propertymanager.Properties[players.get(turn-1).getPosition()]
[0] == 0){
SystemLogHelper.info("enter btnBuy()");
btnBuy();
}
if(rolled) {
btnDone(tempNumOfPlayers);
}
}
}
but I found there is another problem for AIturn(int tempNumOfPlayers),
in the btnRoll() in AIturn(),
if (diceSum> 0){
movePlayer(players.get(index), tempFlagPlayer); // move player one
space each time
diceSum --;
repaint();
}
I found the repaint() doesn't work when it comes to AIturn() call, is
it repaint must be triggered by ActionListener component? If there any
way to force repaint()? Thanks.
I don't see any shared data that is completely guarded. That's fatal right there.
the EDT. Did you know that?
You might not need to call 'repaint()' explicitly. I'd be surprised if you do.
You truly need to study concurrent Java programming. "Throw enough shit at