因此,我试图使用Eclipse Oxygen.2在Java中编写一款名为Lights Out Cube的手持式电子游戏,因此我决定添加一个计时器,以便玩家知道他需要多少时间才能完成游戏。游戏。当玩家单击名为“开始/重置”的按钮(单击一次后将其文本更改为“重置”)时,即启动计时器,游戏开始。每次单击后,我都会检查玩家是否完成了游戏,如果完成了,我将停止计时器。如果他想再次播放,我希望计时器重新启动。请在这里帮助我
//here i have a function called checkIfWinning() which does the checking; if there is a winner, the following code is executed to stop the timer
timer.cancel();
timer.purge();
//timer is a publicly declared java.util.Timer
//this is a code snippet for btnStart with "time" recording the time in seconds
time=0;
timer.schedule(new TimerTask()
{
@Override
public void run()
{
time++;
int hours = (int) time / 3600;
int remainder = (int) time - hours * 3600;
int mins = remainder / 60;
remainder = remainder - mins * 60;
int secs = remainder;
timeTaken.setText(String.format("%02d:%02d:%02d",hours,mins,secs));
}
}, 1000,1000);
无论如何,这可以做到吗?还是我必须完全删除计时器?
答案 0 :(得分:1)
激活TimerTask对象时无法重置,但在特定情况下,可以重置游戏时间计数而无需删除并重新创建定时器。
由于计时器每秒触发一次,因此,当用户单击重置按钮时,只需重置您正在使用的time
变量即可。
我正在根据绿巨人和您的评论来编辑此答案:
绿巨人是正确的,您应该使用AtomicInteger作为时间计数。如果保持计时器运行,则有时可能会出现一个错误,导致该值不会重置。
您可以有一个AtomicBoolean标志,使TimerTask知道玩家是否在玩。
这是一个代码示例:
AtomicInteger time = new AtomicInteger();
//whenever you want to reset it:
time.set(0);
AtomicBoolean isPlaying = new AtomicBoolean();
//when user clicks "start":
isPlaying.set(true);
//when user wins or clicks "reset"
isPlaying.set(false);
//your timer task will look something like this:
public void run() {
if (isPlaying.get()) {
int currentTime = time.incrementAndGet();
int hours = (int) currentTime / 3600;
int remainder = (int) currentTime - hours * 3600;
int mins = remainder / 60;
remainder = remainder - mins * 60;
int secs = remainder;
timeTaken.setText(String.format("%02d:%02d:%02d",hours,mins,secs));
}
}
答案 1 :(得分:0)
这可能很清楚。
您无法在Java中重置或暂停Timer,但可以通过不基于boolean
检查运行计时器来实现此功能。
正如Hulk和Lev.M先前所说,AtomicInteger
可用于需要线程安全的情况。
可以使用run()
将秒转换为指定格式来简化TimeUnit
中的整个逻辑,
time+=1000;
System.out.println(String.format("%02d:%02d:%02d", TimeUnit.SECONDS.toHours(time), TimeUnit.SECONDS.toMinutes(time), time%60));
import java.util.Timer;
import java.util.TimerTask;
public class Game
{
private static int time = 0;
private static Timer t = new Timer();
private static Game g;
private static boolean ispaused = false;
public static void main(String[] args)
{
t.schedule(new TimerTask() {
public void run()
{
if(ispaused)
{
return;
}
time++;
System.out.println(String.format("%02d:%02d:%02d", TimeUnit.SECONDS.toHours(time), TimeUnit.SECONDS.toMinutes(time), time%60));
}
}, 1000, 1000);
g = new Game();
try
{
System.out.println("Starting first game");
g.startGame(); Thread.sleep(5000); g.endGame();
System.out.println("Starting second game.");
g.startGame(); Thread.sleep(5000); g.endGame();
}
catch(Exception e)
{}
}
private void startGame()
{
time = 0;
ispaused = false;
System.out.println("Game Started");
}
private void endGame()
{
time = 0;
ispaused = true;
System.out.println("Game ended");
}
};