How can I remove a JScrollPane from a JFrame?

Question

How can I remove a JScrollPane from a JFrame ?

Here is an example of what I tried, but it isn't working:

Container gContentPane = frame.getContentPane();
JScrollPane scroll = new JScrollPane(gContentPane);
frame.setContentPane( scroll );
frame.revalidate();
frame.repaint();

if (scroll != null){
    frame.getContentPane().remove(scroll);                      
    frame.revalidate(); 
    frame.repaint();
}

The JScrollPane is still there even after frame.getContentPane().remove(scroll); . What do I need to change to remove it?

Answer 1

If you want to remove something in Swing, firstly it has to be added. You did not add the scroll pane nowhere so I would suggest just changing the content pane to the previous one.

Container gContentPane = frame.getContentPane();
JScrollPane scroll = new JScrollPane(gContentPane);
frame.setContentPane( scroll );
frame.revalidate();
frame.repaint();

if (scroll != null) {
    frame.setContentPane(gContentPane);
    frame.revalidate();
    frame.repaint();
}