- Swing Programming Examples
- Example - Home
- Example - Environment Setup
- Example - Borders
- Example - Buttons
- Example - CheckBoxes
- Example - Combo Boxes
- Example - Color Choosers
- Example - Dialogs
- Example - Editor Panes
- Example - File Choosers
- Example - Formatted TextFields
- Example - Frames
- Example - Lists
- Example - Layouts
- Example - Menus
- Example - Password Fields
- Example - Progress Bars
- Example - Scroll Panes
- Example - Sliders
- Example - Spinners
- Example - Tables
- Example - Toolbars
- Example - Tree
- Swing Useful Resources
- Swing - Quick Guide
- Swing - Useful Resources
- Swing - Discussion
Swing Examples - Create Password Field
Following example showcase how to create and use a password field in a Java Swing application.
We are using the following APIs.
JPasswordField − To create a password field.
JPasswordField.getPassword() − To get the password.
Example
package com.tutorialspoint.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingControlDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingControlDemo(){ prepareGUI(); } public static void main(String[] args){ SwingControlDemo swingControlDemo = new SwingControlDemo(); swingControlDemo.showPasswordFieldDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java Swing Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new JLabel("", JLabel.CENTER); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showPasswordFieldDemo(){ headerLabel.setText("Control in action: JPasswordField"); JLabel namelabel= new JLabel("User ID: ", JLabel.RIGHT); JLabel passwordLabel = new JLabel("Password: ", JLabel.CENTER); final JTextField userText = new JTextField(6); final JPasswordField passwordText = new JPasswordField(6); passwordText.setEchoChar('~'); JButton loginButton = new JButton("Login"); loginButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String data = "Username " + userText.getText(); data += ", Password: " + new String(passwordText.getPassword()); statusLabel.setText(data); } }); controlPanel.add(namelabel); controlPanel.add(userText); controlPanel.add(passwordLabel); controlPanel.add(passwordText); controlPanel.add(loginButton); mainFrame.setVisible(true); } }
Compile the program using the command prompt. Go to D:/ > SWING and type the following command.
D:\SWING>javac com\tutorialspoint\gui\SwingControlDemo.java
If no error occurs, it means the compilation is successful. Run the program using the following command.
D:\SWING>java com.tutorialspoint.gui.SwingControlDemo
Verify the following output.
swingexamples_password_fields.htm
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