Press Tab Key to focus to next component - Java Swing

Java examples for Swing:Key Event

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Description

Press Tab Key to focus to next component

Demo Code

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/*/* w  w w .j a  va 2s  .  com*/
 * FocusConceptsDemo.java requires no other files.
 */
public class FocusConceptsDemo extends JPanel {

    static JFrame frame;
    JTextField t1, t2, t3, t4;
    JButton b1, b2, b3, b4;
    JTextArea text1;

    public FocusConceptsDemo() {
        super(new BorderLayout());

        b1 = new JButton("JButton");
        b2 = new JButton("JButton");
        b3 = new JButton("JButton");
        b4 = new JButton("JButton");
        JPanel buttonPanel = new JPanel(new GridLayout(1, 1));
        buttonPanel.add(b1);
        buttonPanel.add(b2);
        buttonPanel.add(b3);
        buttonPanel.add(b4);

        text1 = new JTextArea("JTextArea", 15, 40);
        JPanel textAreaPanel = new JPanel(new BorderLayout());
        textAreaPanel.add(text1, BorderLayout.CENTER);

        t1 = new JTextField("JTextField");
        t2 = new JTextField("JTextField");
        t3 = new JTextField("JTextField");
        t4 = new JTextField("JTextField");
        JPanel textFieldPanel = new JPanel(new GridLayout(1, 1));
        textFieldPanel.add(t1);
        textFieldPanel.add(t2);
        textFieldPanel.add(t3);
        textFieldPanel.add(t4);

        add(buttonPanel, BorderLayout.PAGE_START);
        add(textAreaPanel, BorderLayout.CENTER);
        add(textFieldPanel, BorderLayout.PAGE_END);
        setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
    }

    public static void main(String[] args) {

        /* Use an appropriate Look and Feel */
        try {
            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
            UIManager
                    .setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);

        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        frame = new JFrame("FocusConceptsDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Create and set up the content pane.
        JComponent newContentPane = new FocusConceptsDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

}

/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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