// Fig. 12.7: TextFieldTest.java

// Demonstrating the JTextField class.

// Java core packages

import java.awt.*;

import java.awt.event.*;

// Java extension packages

import javax.swing.*;

public class TextFieldTest extends JFrame {

private JTextField textField1, textField2, textField3;

private JPasswordField passwordField;

// set up GUI

public TextFieldTest()

{

super( "Testing JTextField and JPasswordField" );

Container container = getContentPane();

container.setLayout( new FlowLayout() );

// construct textfield with default sizing

textField1 = new JTextField( 10 );

container.add( textField1 );

// construct textfield with default text

textField2 = new JTextField( "Enter text here" );

container.add( textField2 );

// construct textfield with default text and

// 20 visible elements and no event handler

textField3 = new JTextField( "Uneditable text field", 20 );

textField3.setEditable( false );

container.add( textField3 );

// construct textfield with default text

passwordField = new JPasswordField( "Hidden text" );

container.add( passwordField );

// register event handlers

TextFieldHandler handler = new TextFieldHandler();

textField1.addActionListener( handler );

textField2.addActionListener( handler );

textField3.addActionListener( handler );

passwordField.addActionListener( handler );

setSize( 325, 100 );

setVisible( true );

}

// execute application

public static void main( String args[] )

{

TextFieldTest application = new TextFieldTest();

application.addWindowListener(new WindowAdapter()

{ public void windowClosing( WindowEvent event )

{

System.exit( 0 );

}

}

);

}

// private inner class for event handling

private class TextFieldHandler implements ActionListener {

// process text field events

public void actionPerformed( ActionEvent event )

{

String string = "";

// user pressed Enter in JTextField textField1

if ( event.getSource() == textField1 )

string = "textField1: " + event.getActionCommand();

// user pressed Enter in JTextField textField2

else if ( event.getSource() == textField2 )

string = "textField2: " + event.getActionCommand();

// user pressed Enter in JTextField textField3

else if ( event.getSource() == textField3 )

string = "textField3: " + event.getActionCommand();

// user pressed Enter in JTextField passwordField

else if ( event.getSource() == passwordField ) {

JPasswordField pwd =

( JPasswordField ) event.getSource();

string = "passwordField: " +

new String( passwordField.getPassword() );

}

JOptionPane.showMessageDialog( null, string );

}

} // end private inner class TextFieldHandler

} // end class TextFieldTest