How to Create a Login Form in Swing

on December 28, 2017

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Login Form in Swing

In this example, We will show you sample Java program about, How to create a Login Form in Swing. The example program has been tested and shared in the same post.

Crating Login Form (LoginForm.java)

package com.dineshkrish;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
/**
* 
* @author Dinesh Krishnan
*
*/
public class LoginForm extends JFrame {
private static LoginForm loginForm;
private JPanel panel;
private JLabel userNameLable;
private JLabel passwordLabel;
private JTextField userNameField;
private JPasswordField passwordField;
private JButton loginButton;
private JButton resetButton;
private LoginForm() {
}
public static LoginForm createLoginForm() {
if (loginForm == null) {
loginForm = new LoginForm();
}
return loginForm;
}
public void showForm(String title) {
// setting the window properties
loginForm.setTitle(title);
loginForm.setSize(600, 150);
loginForm.setVisible(true);
loginForm.setDefaultCloseOperation(EXIT_ON_CLOSE);
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
int x = (int) ((screen.getWidth() - this.getWidth()) / 2);
int y = (int) ((screen.getHeight() - this.getHeight()) / 2);
loginForm.setLocation(x, y);
// setting the layout
panel = new JPanel(new GridLayout(3, 2));
userNameLable = new JLabel("Username");
userNameField = new JTextField(15);
passwordLabel = new JLabel("Password");
passwordField = new JPasswordField(15);
// action class
LoginAction action = new LoginAction(userNameField, passwordField);
resetButton = new JButton("Reset");
resetButton.addActionListener(action);
loginButton = new JButton("Login");
loginButton.addActionListener(action);
// adding the components to window
panel.add(userNameLable);
panel.add(userNameField);
panel.add(passwordLabel);
panel.add(passwordField);
panel.add(resetButton);
panel.add(loginButton);
loginForm.add(panel);
}
}

Performing Action (LoginAction.java)

package com.dineshkrish;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JTextField;
/**
* 
* @author Dinesh Krishnan
*
*/
public class LoginAction implements ActionListener {
private JTextField userNameField;
private JTextField passwordField;
public LoginAction(JTextField userNameField, JTextField passwordField) {
this.userNameField = userNameField;
this.passwordField = passwordField;
}
@Override
public void actionPerformed(ActionEvent event) {
if ("Login".equals(event.getActionCommand())) {
String userName = userNameField.getText();
String password = passwordField.getText();
// your business logic goes here
System.out.println("Username :" + userName + ", Password : "
+ password);
} else if ("Reset".equals(event.getActionCommand())) {
userNameField.setText("");
passwordField.setText("");
}
}
}

Main Program (Application.java)

package com.dineshkrish;
/**
* 
* @author Dinesh Krishnan
*
*/
public class Application {
public static void main(String[] args) {
LoginForm form = LoginForm.createLoginForm();
form.showForm("Login");
}
}