Java, JFrame: getWidth() returns 0

Question

setExtendedState(getExtendedState()|JFrame.MAXIMIZED_BOTH);
setResizable(false);
setUndecorated(true);
System.out.println(\"--------> \"+getContentPane().getWidth         


        

Answer 1

You haven't realized (i.e. setVisible(true)) the JFrame yet. And therefore, it has no size since it hasn't laid out its components.