Login page in awt applet Java

Creating Login page in awt applet is easy.

Here we are not using any layout.

Steps by step process to develop this program is as below

Declare Label, JTextField, JPasswordField and Button
Inside init() create object for JLabel, JTextField and JPasswordField and Button
setBounds() to show elements in specific position.
set Container layout to null setLayout(null);
add all elements to container using add()
set size of container setSize(400, 300);
addActionListener() to login and reset button
override actionPerformed() for login and reset
on click on login button if username is Bond007 and password in James007 then show message Dialog Successfully Login
if username and password is incorrect then show message Dialog Opps username/ password is incorrect
on click on reset button reset the values of username and password field

Login page in awt applet Example

package APDemo;
import java.applet.Applet;
import java.awt.Button;
import java.awt.Color;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class LoginPage extends Applet {

    Label userNameLabel, passwordLabel;
    JTextField userName;
    JPasswordField password;

    public void init() {

        userNameLabel = new Label("User Name");
        userName = new JTextField(20);
        userName.setText("User Name");
        passwordLabel = new Label("Password");
        password = new JPasswordField(20);
        password.setText("Password");
        password.setEchoChar('#');
        login = new Button("Login");
        reset = new Button("Reset");
        userNameLabel.setBounds(10, 10, 100, 20);
        userName.setBounds(150, 10, 150, 20);
        passwordLabel.setBounds(10, 50, 100, 20);
        password.setBounds(150, 50, 150, 20);
        login.setBounds(50, 100, 100, 20);
        login.setBackground(Color.GREEN);
        reset.setBounds(200, 100, 100, 20);
        reset.setBackground(Color.CYAN);
        //set applet layout to null
        setLayout(null);
        //add elements to applet
        add(userNameLabel);
        add(userName);
        add(passwordLabel);
        add(password);
        add(login);
        add(reset);

        //set size of applet
        setSize(400, 300);

        //login button click
        login.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                String uname = userName.getText().toString();
                String passwd = password.getText().toString();
                System.out.println("User Name :" + uname);
                System.out.println("Password :" + passwd);
                if (uname.equals("Bond007") && passwd.equals("James007")) {
                    JOptionPane.showMessageDialog(null, "Successfully Login");
                } else {
                    JOptionPane.showMessageDialog(null, "Opps username/ password is incorrect");
                }

            }
        });
        //reset button click
        reset.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
                userName.setText("");
                password.setText("");

            }
        });

    }
}

package APDemo;

import java.applet.Applet;

import java.awt.Button;

import java.awt.Color;

import java.awt.Label;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class LoginPage extends Applet {

Label userNameLabel, passwordLabel;

JTextField userName;

JPasswordField password;

public void init() {

userNameLabel = new Label("User Name");

userName = new JTextField(20);

userName.setText("User Name");

passwordLabel = new Label("Password");

password = new JPasswordField(20);

password.setText("Password");

password.setEchoChar('#');

reset = new Button("Reset");

userNameLabel.setBounds(10, 10, 100, 20);

userName.setBounds(150, 10, 150, 20);

passwordLabel.setBounds(10, 50, 100, 20);

password.setBounds(150, 50, 150, 20);

reset.setBounds(200, 100, 100, 20);

reset.setBackground(Color.CYAN);

//set applet layout to null

setLayout(null);

//add elements to applet

add(userNameLabel);

add(userName);

add(passwordLabel);

add(password);

add(login);

add(reset);

//set size of applet

setSize(400, 300);

//login button click

@Override

public void actionPerformed(ActionEvent ae) {

String uname = userName.getText().toString();

String passwd = password.getText().toString();

System.out.println("User Name :" + uname);

System.out.println("Password :" + passwd);

if (uname.equals("Bond007") && passwd.equals("James007")) {

JOptionPane.showMessageDialog(null, "Successfully Login");

} else {

JOptionPane.showMessageDialog(null, "Opps username/ password is incorrect");

}

});

//reset button click

reset.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent ae) {

userName.setText("");

password.setText("");

}

});

}

Elements are placed in specific position using setBound().

Buttons click events are bind using ActionListener and handled by actionPerformed.

We handled events like below.

login.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent ae) {
             }
}

@Override

public void actionPerformed(ActionEvent ae) {

}

You can handle actionPerformed() separately for that you have to implement ActionListener in your class.

You can run and check Program output

Hope you Got this.

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