Question

I’m trying to make a loader screen in java. So far I’ve managed to successfully make a splash screen for my program, the splash screen works fine.
I’ve used the same code to create the loader but when I call the object only the sleep part works, I mean nothing really appears on the screen.

public class IL extends JWindow {
Image L=Toolkit.getDefaultToolkit().getImage("L.png");
ImageIcon LI=new ImageIcon(L);

public IL (){
try  
{  
setSize(LI.getIconWidth(),LI.getIconHeight());  
setLocationRelativeTo(null); 
show();  
Thread.sleep(10000);  
dispose();  
} 

Answer 1

You’re blocking the UI thread with that sleep, essentially preventing it from displaying anything.

You should use a timer for this. See How to Use Swing Timers and the Swing Timer API docs. You use a timer to do the hide/dispose after however much time you want. You could also use that timer to display a progress bar or animate your loader page.