deleteButton.setFont(font);
this.add(deleteButton);
// 'Zip/Unzip' button.
JButton zipButton = new JButton("Zip/Unzip");
zipButton.setActionCommand(zipButton.getText());
ZipController zipController = new ZipController();
zipController.setPanels(new FileListPanel[]{leftPanel, rightPanel});
zipController.setButtonZip(zipButton);
zipButton.addActionListener(zipController);
zipButton.setFont(font);
this.add(zipButton);
}