JAVA - Tabbed Pane

 

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package tjtabbedpane;

import javax.swing.*;

import javax.swing.event.*;

import java.awt.*;

public class TJTabbedPane extends JApplet {

    JTabbedPane tabbedPane;

    String[] aircraft = {"Aircraft1.jpg",

                         "Aircraft2.jpg",

                         "Aircraft3.jpg"};

    String[] tips = {"Cruise", "Banking", "Take-off"};

    public void init() {

        // 1. Create a tabbed pane object.

        tabbedPane = new JTabbedPane(JTabbedPane.BOTTOM);

        tabbedPane.addChangeListener(new TabbedPaneListener());

        // 2. Add tabs to the tabbed pane. Each tab displays

        // an aircraft. 

        for (int i=0; i<aircraft.length; i++) {

           JLabel label = new JLabel(new ImageIcon(aircraft[i]));

           tabbedPane.addTab("Aircraft-"+(i+1), // Tab text

                             new ImageIcon("smiley.gif"), // Tab icon

                             label,  // component to be displayed 

                             tips[i]); // Some tip at the tab  

        }

        // 3. Add the tabbed pane to the applet.

        getContentPane().add(tabbedPane);

    }

    // 4. Tabbed Pane listener class.

    class TabbedPaneListener implements ChangeListener {

        int selectedIndex = -1; // -1 = default number less than 0

        JTabbedPane tp;

        public void stateChanged(ChangeEvent ce) {

            tp = (JTabbedPane) ce.getSource();

            // 5. Code to disable a tab that has been selected, and

            // enable the tab that has already been disabled. 

           if (selectedIndex == -1 || // if pressed for first time

                selectedIndex != tp.getSelectedIndex()) {

                tp.setEnabledAt(tp.getSelectedIndex(), false);

                if (selectedIndex != -1) // if not the first press

                   tp.setEnabledAt(selectedIndex, true);

            }

            // Store the index of the newly selected tab.

            selectedIndex = tp.getSelectedIndex();

        }

    }

}