Java Tutorial/Swing/JPasswordField

Add action listener to JPasswordField

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPasswordField;
public class Main extends JFrame {
  JPasswordField field = new JPasswordField("*", 10);
  public Main() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    field.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        System.out.println("Field=" + field.getText());
      }
    });
    getContentPane().add(field);
    pack();
    setVisible(true);
  }
  public static void main(String arg[]) {
    new Main();
  }
}

Customizing a JPasswordField Look and Feel

Property StringObject TypePasswordField.actionMapActionMapPasswordField.backgroundColorPasswordField.borderBorderPasswordField.caretAspectRatioNumberPasswordField.caretBlinkRateIntegerPasswordField.caretForegroundColorPasswordField.disabledBackgroundColorPasswordField.focusInputMapInputMapPasswordField.fontFontPasswordField.foregroundColorPasswordField.inactiveBackgroundColorPasswordField.inactiveForegroundColorPasswordField.keyBindingsKeyBinding[ ]PasswordField.marginInsetsPasswordField.selectionBackgroundColorPasswordField.selectionForegroundColorPasswordFieldUIString

Password field with key event

import java.awt.BorderLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
public class PasswordFieldEchoChar extends JFrame {
  public static void main(String[] args) {
    PasswordFieldEchoChar that = new PasswordFieldEchoChar();
    that.setVisible(true);
  }
  public PasswordFieldEchoChar() {
    setSize(450, 350);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    getContentPane().add(new PasswordPanel(), BorderLayout.SOUTH);
  }
}
class PasswordPanel extends JPanel {
  JPasswordField pwf;
  public PasswordPanel() {
    pwf = new JPasswordField(10);
    pwf.setEchoChar("#");
    add(pwf);
    pwf.addKeyListener(new KeyAdapter() {
      public void keyReleased(KeyEvent e) {
        System.out.println(new String(pwf.getPassword()));
      }
    });
  }
}

Using Actions with Text Components: JPasswordField

import java.util.Arrays;
import java.util.ruparator;
import javax.swing.Action;
import javax.swing.JPasswordField;
import javax.swing.text.JTextComponent;
public class ListActionsJPasswordField {
  public static void main(String args[]) {
    JTextComponent component = new JPasswordField();
    // Process action list
    Action actions[] = component.getActions();
    // Define comparator to sort actions
    Comparator<Action> comparator = new Comparator<Action>() {
      public int compare(Action a1, Action a2) {
        String firstName = (String) a1.getValue(Action.NAME);
        String secondName = (String) a2.getValue(Action.NAME);
        return firstName.rupareTo(secondName);
      }
    };
    Arrays.sort(actions, comparator);
    int count = actions.length;
    System.out.println("Count: " + count);
    for (int i = 0; i < count; i++) {
      System.out.printf("%28s : %s\n",actions[i].getValue(Action.NAME),actions[i].getClass().getName());
    }
  }
}

Count: 54
                        beep : javax.swing.text.DefaultEditorKit$BeepAction
              caret-backward : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
                 caret-begin : javax.swing.text.DefaultEditorKit$BeginAction
            caret-begin-line : javax.swing.text.DefaultEditorKit$BeginLineAction
       caret-begin-paragraph : javax.swing.text.DefaultEditorKit$BeginParagraphAction
            caret-begin-word : javax.swing.text.DefaultEditorKit$BeginWordAction
                  caret-down : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
                   caret-end : javax.swing.text.DefaultEditorKit$EndAction
              caret-end-line : javax.swing.text.DefaultEditorKit$EndLineAction
         caret-end-paragraph : javax.swing.text.DefaultEditorKit$EndParagraphAction
              caret-end-word : javax.swing.text.DefaultEditorKit$EndWordAction
               caret-forward : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
             caret-next-word : javax.swing.text.DefaultEditorKit$NextWordAction
         caret-previous-word : javax.swing.text.DefaultEditorKit$PreviousWordAction
                    caret-up : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
           copy-to-clipboard : javax.swing.text.DefaultEditorKit$CopyAction
            cut-to-clipboard : javax.swing.text.DefaultEditorKit$CutAction
               default-typed : javax.swing.text.DefaultEditorKit$DefaultKeyTypedAction
                 delete-next : javax.swing.text.DefaultEditorKit$DeleteNextCharAction
             delete-previous : javax.swing.text.DefaultEditorKit$DeletePrevCharAction
                  dump-model : javax.swing.text.DefaultEditorKit$DumpModelAction
                insert-break : javax.swing.text.DefaultEditorKit$InsertBreakAction
              insert-content : javax.swing.text.DefaultEditorKit$InsertContentAction
                  insert-tab : javax.swing.text.DefaultEditorKit$InsertTabAction
         notify-field-accept : javax.swing.JTextField$NotifyAction
                   page-down : javax.swing.text.DefaultEditorKit$VerticalPageAction
                     page-up : javax.swing.text.DefaultEditorKit$VerticalPageAction
        paste-from-clipboard : javax.swing.text.DefaultEditorKit$PasteAction
                  select-all : javax.swing.text.DefaultEditorKit$SelectAllAction
                 select-line : javax.swing.text.DefaultEditorKit$SelectLineAction
            select-paragraph : javax.swing.text.DefaultEditorKit$SelectParagraphAction
                 select-word : javax.swing.text.DefaultEditorKit$SelectWordAction
          selection-backward : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
             selection-begin : javax.swing.text.DefaultEditorKit$BeginAction
        selection-begin-line : javax.swing.text.DefaultEditorKit$BeginLineAction
   selection-begin-paragraph : javax.swing.text.DefaultEditorKit$BeginParagraphAction
        selection-begin-word : javax.swing.text.DefaultEditorKit$BeginWordAction
              selection-down : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
               selection-end : javax.swing.text.DefaultEditorKit$EndAction
          selection-end-line : javax.swing.text.DefaultEditorKit$EndLineAction
     selection-end-paragraph : javax.swing.text.DefaultEditorKit$EndParagraphAction
          selection-end-word : javax.swing.text.DefaultEditorKit$EndWordAction
           selection-forward : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
         selection-next-word : javax.swing.text.DefaultEditorKit$NextWordAction
         selection-page-down : javax.swing.text.DefaultEditorKit$VerticalPageAction
         selection-page-left : javax.swing.text.DefaultEditorKit$PageAction
        selection-page-right : javax.swing.text.DefaultEditorKit$PageAction
           selection-page-up : javax.swing.text.DefaultEditorKit$VerticalPageAction
     selection-previous-word : javax.swing.text.DefaultEditorKit$PreviousWordAction
                selection-up : javax.swing.text.DefaultEditorKit$NextVisualPositionAction
               set-read-only : javax.swing.text.DefaultEditorKit$ReadOnlyAction
                set-writable : javax.swing.text.DefaultEditorKit$WritableAction
 toggle-componentOrientation : javax.swing.text.DefaultEditorKit$ToggleComponentOrientationAction
                    unselect : javax.swing.text.DefaultEditorKit$UnselectAction

Using JPasswordField

import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class JPasswordFieldTest extends JFrame {
  public static void main(String[] args) {
    JFrame.setDefaultLookAndFeelDecorated(true);
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setTitle("JTextField Test");
    frame.setLayout(new GridLayout(2, 2));
    JLabel label = new JLabel("User Name:", SwingConstants.RIGHT);
    JLabel label2 = new JLabel("Password:", SwingConstants.RIGHT);
    JTextField userNameField = new JTextField(20);
    JPasswordField passwordField = new JPasswordField();
    frame.add(label);
    frame.add(userNameField);
    frame.add(label2);
    frame.add(passwordField);
    frame.setSize(200, 70);
    frame.setVisible(true);
  }
}