🚀 go-pugleaf

Try this

JPanel panel = new JPanel();
panel.add(new JLabel("hello"));
scrollpane.getViewport().remove(table);
scrollpane.getViewport().removeNotify();
// remove this line scrollpane.getViewport().repaint();
scrollpane.getViewport().add(panel);
// add this line
validate();

Basically, when you add/remove things after a container has been displayed,
you need to call validate() for the container so it re lays out itself. My
rule of thumb is that I never call repaint(), paint() etc and I instead call
validate().