public abstract class Timer
extends java.lang.Object
To schedule a timer, simply create a subclass of it (overriding run())
and call schedule(int) or scheduleRepeating(int).
NOTE: If you are using a timer to schedule a UI animation, use
AnimationScheduler instead. The
browser can optimize your animation for maximum performance.
public class TimerExample implements EntryPoint, ClickHandler {
public void onModuleLoad() {
Button b = new Button("Click and wait 5 seconds");
b.addClickHandler(this);
RootPanel.get().add(b);
}
public void onClick(ClickEvent event) {
// Create a new timer that calls Window.alert().
Timer t = new Timer() {
@Override
public void run() {
Window.alert("Nifty, eh?");
}
};
// Schedule the timer to run once in 5 seconds.
t.schedule(5000);
}
}
| Constructor and Description |
|---|
Timer() |
| Modifier and Type | Method and Description |
|---|---|
void |
cancel()
Cancels this timer.
|
(package private) void |
fire(int scheduleCancelCounter) |
boolean |
isRunning()
Returns
true if the timer is running. |
abstract void |
run()
This method will be called when a timer fires.
|
void |
schedule(int delayMillis)
Schedules a timer to elapse in the future.
|
void |
scheduleRepeating(int periodMillis)
Schedules a timer that elapses repeatedly.
|
public final boolean isRunning()
true if the timer is running. Timer is running if and only if it is scheduled
but it is not expired or cancelled.public void cancel()
public abstract void run()
public void schedule(int delayMillis)
delayMillis - how long to wait before the timer elapses, in millisecondspublic void scheduleRepeating(int periodMillis)
periodMillis - how long to wait before the timer elapses, in milliseconds, between each
repetitionfinal void fire(int scheduleCancelCounter)