java 如何判断Timer任务是否完成
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How to determine whether the Timer task has completed
提问by Pavan
I have this following code :
我有以下代码：
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
// TODO Auto-generated method stub
}
};
timer.schedule(task, 10000);//execute after 10 seconds
Can we determine whether the task is already executed by the timer or is still due?
我们可以确定任务是已经被定时器执行了还是仍然到期？
回答by DroidBender
Add a simple variable like..
添加一个简单的变量，如..
boolean isTaskCompleted = false;
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
// do stuff
isTaskCompleted = true;
}
};
timer.schedule(task, 10000);//execute after 10 seconds
回答by JustDanyul
Sure,
当然，
class CustomTask extends TimerTask {
protected boolean isDone = false;
public boolean isDone() {return isDone; }
@Override
public void run() {}
}
CustomTask task = new CustomTask() {
@Override
public void run() {
isDone=true;
}
};
EDIT: If you are not happy with extending the class, you could use the method scheduledExecutionTime(), this returns 0 if the task have not been run.
编辑：如果您对扩展类不满意，您可以使用方法 scheduleExecutionTime()，如果任务尚未运行，则返回 0。
http://docs.oracle.com/javase/6/docs/api/java/util/TimerTask.html
http://docs.oracle.com/javase/6/docs/api/java/util/TimerTask.html
