GWT: using Timer as in Tread sleep()

You can use the timer to put the application to sleep, or in this case to change content every 3 seconds.

    private String currentImage = "1.png";

    private int refreshIntervalMilliseconds = 3000;

    public void onModuleLoad()

    {

params = CommonUtils.parseParamString();

Timer t = new Timer()

{

    public void run()

    {

if (currentImage.equals("1.png"))

    currentImage = "2.png";

else if (currentImage.equals("2.png"))

    currentImage = "3.png";

else if (currentImage.equals("3.png"))

    currentImage = "4.png";

else if (currentImage.equals("4.png"))

    currentImage = "1.png";

RootPanel.get("content").clear();

RootPanel.get("content").add(new Label("Current time: " + new Date()));

RootPanel.get("content").add(new Image("images/" + currentImage));

System.out.println("Putting system to sleep for " + refreshIntervalMilliseconds / 1000 + " seconds. currentImage = " + currentImage);

    }

};

t.scheduleRepeating(refreshIntervalMilliseconds);

    }