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/**
* @version 1.00 1999-07-17
* @author Cay Horstmann
*/
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
public class SwingTabbedPaneTest {
public static void main(String[] args)
{ JFrame frame = new TabbedPaneFrame();
frame.show();
}
}
class TabbedPaneFrame extends JFrame
implements ChangeListener
{ public TabbedPaneFrame()
{ setTitle("TabbedPaneTest");
setSize(400, 300);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
}
} );
tabbedPane = new JTabbedPane();
tabbedPane.addChangeListener(this);
/* we set the components to null and delay their
loading until the tab is shown for the first time
*/
ImageIcon icon = new ImageIcon("yellow-ball.gif");
tabbedPane.addTab("Mercury", icon, null);
tabbedPane.addTab("Venus", icon, null);
tabbedPane.addTab("Earth", icon, null);
tabbedPane.addTab("Mars", icon, null);
tabbedPane.addTab("Jupiter", icon, null);
tabbedPane.addTab("Saturn", icon, null);
tabbedPane.addTab("Uranus", icon, null);
tabbedPane.addTab("Neptune", icon, null);
tabbedPane.addTab("Pluto", icon, null);
getContentPane().add(tabbedPane, "Center");
}
public void stateChanged(ChangeEvent event)
{ JTabbedPane pane = (JTabbedPane)event.getSource();
// check if this tab still has a null component
if (pane.getSelectedComponent() == null)
{ // set the component to the image icon
int n = pane.getSelectedIndex();
String title = pane.getTitleAt(n);
ImageIcon planetIcon = new ImageIcon(title + ".gif");
pane.setComponentAt(n, new JLabel(planetIcon));
// indicate that this tab has been visited--just for fun
pane.setIconAt(n, new ImageIcon("red-ball.gif"));
}
}
private JTabbedPane tabbedPane;
}
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