public void actionPerformed(ActionEvent e) {
JTabbedPane pane = (JTabbedPane) e.getSource();
CloseTabPaneUI ui = (CloseTabPaneUI) pane.getUI();
int tabPlacement = pane.getTabPlacement();
if (tabPlacement == TOP || tabPlacement == BOTTOM) {
ui.navigateSelectedTab(EAST);
} else {
ui.navigateSelectedTab(SOUTH);
}
}
public void actionPerformed(ActionEvent e) {
JTabbedPane pane = (JTabbedPane) e.getSource();
CloseTabPaneUI ui = (CloseTabPaneUI) pane.getUI();
ui.navigateSelectedTab(PREVIOUS);
}