Passive TextField 2 : TextField « Swing JFC « Java

Passive TextField 2

Passive TextField 2
Core SWING Advanced Programming 
By Kim Topley
ISBN: 0 13 083292 8       
Publisher: Prentice Hall  

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Action;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.text.Document;
import javax.swing.text.Keymap;

public class PassiveTextField2 extends JTextField {
  public PassiveTextField2() {
    this(null, null, 0);

  public PassiveTextField2(String text) {
    this(null, text, 0);

  public PassiveTextField2(int columns) {
    this(null, null, columns);

  public PassiveTextField2(String text, int columns) {
    this(null, text, columns);

  public PassiveTextField2(Document doc, String text, int columns) {
    super(doc, text, columns);

  public void setKeymap(Keymap map) {
    if (map == null) {
      // Uninstalling keymap.
      sharedKeymap = null;

    if (getKeymap() == null) {
      if (sharedKeymap == null) {
        // Initial keymap, or first
        // keymap after L&F switch.
        // Generate a new keymap
        sharedKeymap = addKeymap(null, map.getResolveParent());
        KeyStroke[] strokes = map.getBoundKeyStrokes();
        for (int i = 0; i < strokes.length; i++) {
          Action a = map.getAction(strokes[i]);
          if (a.getValue(Action.NAME) == JTextField.notifyAction) {
          sharedKeymap.addActionForKeyStroke(strokes[i], a);
      map = sharedKeymap;

  protected static Keymap sharedKeymap;

  // Test method
  public static void main(String[] args) {
    try {
    } catch (Exception evt) {}
    JFrame f = new JFrame("Passive Text Field");
        new BoxLayout(f.getContentPane(), BoxLayout.Y_AXIS));
    final PassiveTextField2 ptf = new PassiveTextField2(32);

    JTextField tf = new JTextField(32);
    JPanel p = new JPanel();
    JButton b = new JButton("OK");

    ActionListener l = new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        System.out.println("Action event from a text field");

    // Make the button the default button
    b.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        System.out.println("Content of text field: <" + ptf.getText()
            + ">");


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