refresh JFrame after adding new Components

Question

I want to add some new Components to my JFrame during runtime when a button is pressed. This works so far, but i have to resize the window manually to see the new components.

Is there any Action I can fire or a method to call to refresh the window? Any help appreciated. Thanks in advance.

Answer 1

You have to revalidate(); the frame. If that doesn't work you also have to call repaint();

Answer 2

Call

revalidate(); repaint(); 

revalidate tells the layout manager to reset based on the new component list. This will also trigger a call to repaint.

repaint is used to tell a component to repaint itself.