Demo for three types of text component: JTextField, JPasswordField, JTextArea
/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
/**
* @version 1.40 2007-04-27
* @author Cay Horstmann
*/
public class TextComponentTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
TextComponentFrame frame = new TextComponentFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
/**
* A frame with sample text components.
*/
class TextComponentFrame extends JFrame
{
public TextComponentFrame()
{
setTitle("TextComponentTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
final JTextField textField = new JTextField();
final JPasswordField passwordField = new JPasswordField();
JPanel northPanel = new JPanel();
northPanel.setLayout(new GridLayout(2, 2));
northPanel.add(new JLabel("User name: ", SwingConstants.RIGHT));
northPanel.add(textField);
northPanel.add(new JLabel("Password: ", SwingConstants.RIGHT));
northPanel.add(passwordField);
add(northPanel, BorderLayout.NORTH);
final JTextArea textArea = new JTextArea(8, 40);
JScrollPane scrollPane = new JScrollPane(textArea);
add(scrollPane, BorderLayout.CENTER);
// add button to append text into the text area
JPanel southPanel = new JPanel();
JButton insertButton = new JButton("Insert");
southPanel.add(insertButton);
insertButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
textArea.append("User name: " + textField.getText() + " Password: "
+ new String(passwordField.getPassword()) + "\n");
}
});
add(southPanel, BorderLayout.SOUTH);
// add a text area with scroll bars
}
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 300;
}
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