Hello Eryk

Try the following code. Even if it is not the best way to resize the
JFrame after the "setVisible()" command it would also work (I just
tested this on linux).

If the following code does not work as expected (draw a frame with
300x300 pixel size), I don't have a solution for your problem.
If the following code works, but your code still does not, please
provide your code to analyze.

greets

-------------------------------------------

import javax.swing.JFrame;

public class SizeFrame  {
   public SizeFrame() {
       JFrame jf = new JFrame("My Frame Title");
       jf.setSize(300, 300);
       jf.setVisible(true);
   }

   public static void main(String[] args) {
       new SizeFrame();
   }
}

   Google for "LayoutManager", "setPreferredSize" and "setMinimumSize".

   - Oliver