Login Code In Java With Source Code

The Login Code in Java is a fully functional desktop application designed using the Java Swing toolkit.

It is meant to help IT students with their college projects by giving them a free login system that can be used as a guide to their developing projects.

In addition, the Login code is very simple and easy to understand by the user and apply to their developing projects, this Login Form is good for beginners who want to learn Java programming.

Why is it important to have a login code?

In Java, login is one important part of the system that should have been developed because it serves as a first defense to unauthorized people who try to access the entire system.

It also serves as protection against hackers and malicious attacks.

What is a Login Code In Java?

In Java, a login code is a form that restricts access to a restricted page. A login form only has two fields the username and the password.

Every user should have their own username, which can be an email address, a phone number, or anything else.

About login code in Java project details

The Importance Of Usernames And Passwords

A username and Password are used to make a digital profile about you that is one of a kind.

For example, if you shop online, your shipping address, credit card number, and shopping history will be linked to your username.

More details about this project

The login program is developed in Java using Swing Technology. Swing is a technology designed in Java to help developers to design in the easiest way.

You can easily drag and drop buttons, text boxes, and more.

Furthermore, this project is also connected to the MySQL database to store and retrieve data. Using the JDBC MySQL connector, you can now connect to the login code program.

Also, the system has only two textboxes and one button. We named the buttons username and password for better user experience. Each user needs to log in with their unique authentication credentials that are stored in the database.

After submitting your credentials to the login form, you will now be redirected to a new window in Java. Yet this project has only a login form.

It’s up to you when to add another. The aim of this article is to provide only a simple login form using JFrame.

What is a JFrame in Java?

A JFrame is a top-level container that shows up on the screen as a window in different code editors.

My favorite code editor in Java is NetBeans because it is already built into the editor.

A frame is actually a base window that contains the menu bar, panels, labels, text fields, buttons, etc. depending on whether jframe can be terminated by jframe.exit to close.

I have used this frame for a long time since I started learning programming. This is one of the best learning tools that served as my hobby for my leisure time.

I have lots of projects that were developed using this frame. I highly recommend this tool in Java. Actually, this is not a tool, this is part of the Java Swing toolkit.

What is GUI in Java?

In Java, GUI stands for (Graphical User Interface) and is kept in containers called forms.

The Java programming language comes with a set of user interface parts that can be used to build GUI forms.

Why was MySQL used in this project?

I choose MySQL as my database because the process is very safe and most developers trust MySQL more than anything else.

It provides effective transactions for large-volume projects It makes maintenance, bug fixing, and upgrades quick and easy, and it improves the experience for end users.

This simple project also includes downloadable source code for free. Just find the downloadable source code below and click to start downloading.

To start creating a Login Code in NetBeans With MySQL, make sure that you have the NetBeans IDE installed on your computer.

Steps on how to create a simple Login Code in NetBeans with MySQL with Source Code

Declaring and Naming Variables

You can change the variables of the given TextFields and buttons below.

For the Textfield:

• jTextField1 = uname
• jTextField2 = upass

For the Button:

• jButton1 = login_button

The code given below is the MySQL connection

In this module is the connection under Java into the mysql database.

try {
    Class.forName("com.mysql.jdbc.Driver");
    String conURL = "jdbc:mysql://localhost/user?" +
        "user=root&password=";
    java.sql.Connection con = DriverManager.getConnection(conURL);

} catch (SQLException x) {
    x.printStackTrace();
} catch (ClassNotFoundException ex) {
    Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null, ex);
}

Complete Source Code

Put this complete source code under the “login_button” button.

try {

    Class.forName("com.mysql.jdbc.Driver");

    String conURL = "jdbc:mysql://localhost/user?"

        +
        "user=root&password=";

    java.sql.Connection con = DriverManager.getConnection(conURL);

    //MyConnection();

    // PreparedStatement ps;

    //ResultSet rs;

    //string username or string user

    String uname1 = uname.getText();

    // password label and password string

    String pass1 = String.valueOf(upass.getText());



    //String query = "SELECT * FROM `the_app_users` WHERE `u_uname` =? AND `u_pass` =?";

    java.sql.Statement stmt = con.createStatement();

    String sql = "SELECT * FROM `tbluser` WHERE `u_uname` = '" + uname1 + "' AND `u_pass` ='" + pass1 + "'";

    stmt.execute(sql);

    ResultSet rs = stmt.executeQuery(sql);

    // java.sql.Statement stmt = con.createStatement();


    // rs = ps.executeQuery();


    if (rs.next())

    {

        //successful else

        JOptionPane.showMessageDialog(null, "Login Successfull", "Login Success", 1);

        //home mf = new home();

        new home().setVisible(true);

        this.dispose();

    } else {

        // error message

        JOptionPane.showMessageDialog(null, "Incorrect Username Or Password", "Login Failed", 2);

    }



} catch (SQLException x) {

    x.printStackTrace();

} catch (ClassNotFoundException ex) {

    Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null, ex);

}

Output:

Login Success

Opening New Window

Downloadable Source Code Below

Summary

The system is built fully in Java and MySQL Database.

It has a full-featured Graphical User Interface (GUI) with all the functionalities.

This article is a way to enhance and develop our skills and logic ideas which is important in practicing the Java programming language which is the most well-known and most usable programming language in many companies.

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Inquiries

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