It seems like the last item always overwrites the previous items, so that only one of those is displayed
Also, I have another question is that if I have to have 4 to 5 JPanels stacking up in the JFrame, is it
the only way to break the JFrame up into BorderLayout, and break down the Center Panel again?
Now, I add a JScrollPane into the JFrame with this.add(customerListingPane, BorderLayout.SOUTH);
and BorderLayout.PAGE_END and I can't see the JScrollPane in anyway?