Java Timer in GWT

Question

I'm trying to have a Java Timer in my EntryPoint:

Timer timer = new Timer();
timer.schedule(
   new TimerTask() {
       public void run() {
           //some code
       }
   }
   , 5000);

But when trying to compile this I got: No source code is available for type java.util.Timer; did you forget to inherit a required module?

What can I do to fix this error?

possible duplicate of [GWT - did you forget to inherit a required module?](http://stackoverflow.com/questions/5575909/gwt-did-you-forget-to-inherit-a-required-module) — dunni, Mar 21 '13 at 21:01
Not really a duplicate of http://stackoverflow.com/questions/5575909/gwt-did-you-forget-to-inherit-a-required-module because its in the context of Libgdx. Though that link is definitely useful to explain where the error is originating. — P.T., Mar 22 '13 at 00:12

score 14 · Answer 1 · edited Oct 04 '13 at 06:51

14

In GWT you are restricted to use all the Util package classes.

Here is the List of Classes only you can use from util class.

You can use GWT Timer class.

Example(from docs);

 public void onClick(ClickEvent event) {
    // Create a new timer that calls Window.alert().
    Timer t = new Timer() {   //import (com.google.gwt.user.client.Timer)
      @Override
      public void run() {
        Window.alert("Nifty, eh?");
      }
    };

    // Schedule the timer to run once in 5 seconds.
    t.schedule(5000);
  }

edited Oct 04 '13 at 06:51

Henrik Aasted Sørensen

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answered Mar 20 '13 at 15:57

Suresh Atta

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1

Please always add latest documentation links. – appbootup Mar 20 '13 at 16:09
Oops..didn't check.Sorry for the old link.Thanks for the edit @SSR. – Suresh Atta Mar 20 '13 at 16:11
Added comment besides new Timer() is very important. Generally people will choose java.util.Timer (Like me ;) ) Thanks! – Jayesh Dhandha Jan 27 '20 at 07:47

P.T. · Accepted Answer · 2013-03-21T16:15:47.753

If you're using Libgdx, you can use the libgdx Timer infrastructure to schedule work to run in the future:

Timer t = new Timer();
t.scheduleTask(new Timer.Task() { 
      public void run() { /* some code */ } 
  }), /* Note that libgdx uses float seconds, not integer milliseconds: */ 5);

This way you can schedule the timer in your platform independent code. (The GWT-specific solution will only work in the platform dependent part of your project.)

Java Timer in GWT

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