How to create JFrame in the same thread so that it blocks?

Question

For debug purposes, I need to draw image on the screen in a simple window.

Swing handles all it\'s events in a separate message loop thread. That means that if I do

Answer 1

Build your GUI outside the loop once and then use

 // read new component data
 screenshot = MSWindow.screenshot();
 // modify components
 label = new JLabel(new ImageIcon(screenshot));     

 // force the frame to repaint its chilfren
 frame.revalidate();
 frame.pack();

to "refresh" it inside the loop.