GYM Management System Using Java [GUI using Swing]

GYM Management System Using Java

Introduction

A Gym Management System (GMS) is a special type of software created to cater to the needs of a particular fitness center. It aids in the proper maintenance of a member’s records. The application helps associated staff and even owners in keeping track of all members which includes tracking memberships, renewals as well as streamlining operations. In this project, we construct a simple yet effective desktop GUI application using Java Swing.

Goals:

Track issues of gym members.
Create, edit and delete member records.
Maintain membership types: Monthly, Quarterly, and Yearly.
Display members in a listview.
Improve front-desk work flow in the gyms.

Used Technologies:

Component Technology
Programming Language: Java
GUI Framework: Java Swing
IDE: NetBeans / Eclipse / IntelliJ IDEA
Storage: ArrayList (in-memory) – could evolve into a database
File Saving: (Optional) File handling / Database for data persistence

System Modules:

1. Add Member

Specify id, name, age and membership type
Append onto the member list

2. View Members

List all members for viewing in a table.
Choose to load a member into the form for update/delete.

3. Update Member

Change /update selected member’s details.
Cannot change member ID field.

4. Delete Member

Erase selected member from the system

Special Features:

Menu-controlled desktop application.
Automatic verification for number type fields.
Dialog window for user instructions.
Select from a table for easier table updates.
Balanced arrangement and real-time…

STEPS TO DEVELOP A STUDENT MANAGEMENT SYSTEM

Follow these procedures in creating a Java Project for Gym Management System with Source Code.

Procedure 1: Set up a project. To begin, open any file and select “project” in order to start a new one.

Procedure 2: Define your project. For the second procedure, provide a name for your project.

Procedure 3: Create a JFrame form.

For the third procedure, you need to create a “JFrame” form.

Procedure 4: Create JFrame form name.

For the fourth procedure, provide a name for your JFrame form.

Procedure 5: Work on the project.

For the fifth procedure, work on the actual design of the project.

Executing the Codes

Prerequisites

An updated JDK (Java Development Kit) 8 or higher
NetBeans or iphone IDE
NetBeans IDE, IntelliJ, and Eclipse will be enough
A basic understanding of Java Swing’s user interfaces.

Step one is project creation

Launch NetBeans.

Open a new project from the file section.

Java Application will be bound to Java so select that and press next.

You may select your project name as GymManagementSystem or anything that suits you.

“Creating Main Class” will be checked by default. So, unselect that and press finish.

After that the main class is formed of Gym Management System.

Code Usage

Description of Class

public class GymManagementGUI extends JFrame {

This class inherits JFrame, thus this is a window based GUI application.

Data Members and Components

private JTextField txtId, txtName, txtAge; private JComboBox cmbMembership; private DefaultTableModel model; private JTable table; private ArrayList members = new ArrayList<>();

txtId, txtName, txtAge – fields to enter information of members.
cmbMembership – combo box for selecting type of membership.
model – a data model for the table (JTable).
table – a member’s list.
members – list to hold member objects of class Member.

Constructor: GymManagementGUI()

Sets entire the entire GUI layout and logic.

➤ Window setup:

SetTitle(“Gym Management System”);

SetSize(700,450);

SetDefaultCloseOperation(JFrame.EXITONCLOSE);

SetLocationRelativeTo(null);

SetLayout(null);

Sets window title, sets the size of the window, sets the default close behavior and the layout.

➤ Input Fields and Labels

JLabel lblId = new JLabel("ID:"); txtId = new JTextField();

Similar blocks are created for Name, Age and Membership.

String[] memberships = {“Monthly”, “Quarterly”, “Yearly”};
cmbMembership = new JComboBox<>(memberships);

Similar blocks are created for Name, Age and Membership.

➤ Button Declaration

JButton btnAdd = new JButton("Add");
JButton btnUpdate = new JButton("Update");

btnAdd.addActionListener(e -> addMember());

➤ Table

String columnNames[] = new String[]{"ID","Name","Age","Membership"};

model = new DefaultTableModel(columnNames, 0);

table = new JTable(model);

Initializes a JTable named table and sets a header with DefaultTableModel containing four columns.

JScrollPane scrollpane = new JScrollPane(table);

Enables scrolling through the table.

Function Definitions

1.addMember()

int id = Integer.parseInt(txtId.getText());

String name = txtName.getText();

Gets values from the form using get methods from text boxes.
Checks if the ID already exists.
Puts member into members and model table.

updateMember()

int selectedRow = table.getSelectedRow();

Gets the selected row’s index.
Updates the array list and the model table.

3.deleteMember()

int selectedRow = table.getSelectedRow();

int id = Integer.parseInt(model.getValueAt(selectedRow,0).toString());

Using the ID of the member, the system will delete the member record.

clearFields()

txtId.setText(""); txtName.setText(""); txtAge.setText("");

Clears the form for the next action.

main() Method

public static void main(String[] args] {

SwingUtilities.invokeLater(()->{

GymManagementGUI app = new GymManagementGUI();

app.setVisible(true);

});

}

Safely starts the GUI in the event dispatch thread.

Source Code:

				
					import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;

class Member {
    int id;
    String name;
    int age;
    String membershipType;

    Member(int id, String name, int age, String membershipType) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.membershipType = membershipType;
    }
}

public class GymManagementGUI extends JFrame {
    private JTextField txtId, txtName, txtAge;
    private JComboBox<String> cmbMembership;
    private DefaultTableModel model;
    private JTable table;
    private ArrayList<Member> members = new ArrayList<>();

    public GymManagementGUI() {
        setTitle("Gym Management System");
        setSize(700, 450);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setLayout(null);

        // Labels and Inputs
        JLabel lblId = new JLabel("ID:");
        lblId.setBounds(20, 20, 100, 25);
        add(lblId);
        txtId = new JTextField();
        txtId.setBounds(120, 20, 150, 25);
        add(txtId);

        JLabel lblName = new JLabel("Name:");
        lblName.setBounds(20, 60, 100, 25);
        add(lblName);
        txtName = new JTextField();
        txtName.setBounds(120, 60, 150, 25);
        add(txtName);

        JLabel lblAge = new JLabel("Age:");
        lblAge.setBounds(20, 100, 100, 25);
        add(lblAge);
        txtAge = new JTextField();
        txtAge.setBounds(120, 100, 150, 25);
        add(txtAge);

        JLabel lblMembership = new JLabel("Membership:");
        lblMembership.setBounds(20, 140, 100, 25);
        add(lblMembership);
        String[] memberships = {"Monthly", "Quarterly", "Yearly"};
        cmbMembership = new JComboBox<>(memberships);
        cmbMembership.setBounds(120, 140, 150, 25);
        add(cmbMembership);

        // Buttons
        JButton btnAdd = new JButton("Add");
        btnAdd.setBounds(20, 190, 80, 30);
        add(btnAdd);
        JButton btnUpdate = new JButton("Update");
        btnUpdate.setBounds(110, 190, 80, 30);
        add(btnUpdate);
        JButton btnDelete = new JButton("Delete");
        btnDelete.setBounds(200, 190, 80, 30);
        add(btnDelete);

        // Table to show members
        String[] columnNames = {"ID", "Name", "Age", "Membership"};
        model = new DefaultTableModel(columnNames, 0);
        table = new JTable(model);
        JScrollPane scrollPane = new JScrollPane(table);
        scrollPane.setBounds(300, 20, 370, 350);
        add(scrollPane);

        // Button actions
        btnAdd.addActionListener(e -> addMember());
        btnUpdate.addActionListener(e -> updateMember());
        btnDelete.addActionListener(e -> deleteMember());

        // Table row select to fill form
        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                int selectedRow = table.getSelectedRow();
                if (selectedRow >= 0) {
                    txtId.setText(model.getValueAt(selectedRow, 0).toString());
                    txtName.setText(model.getValueAt(selectedRow, 1).toString());
                    txtAge.setText(model.getValueAt(selectedRow, 2).toString());
                    cmbMembership.setSelectedItem(model.getValueAt(selectedRow, 3).toString());
                    txtId.setEnabled(false);
                }
            }
        });
    }

    private void addMember() {
        try {
            int id = Integer.parseInt(txtId.getText());
            String name = txtName.getText();
            int age = Integer.parseInt(txtAge.getText());
            String membership = cmbMembership.getSelectedItem().toString();

            for (Member m : members) {
                if (m.id == id) {
                    JOptionPane.showMessageDialog(this, "Member ID already exists!");
                    return;
                }
            }

            Member member = new Member(id, name, age, membership);
            members.add(member);
            model.addRow(new Object[]{id, name, age, membership});
            clearFields();
            JOptionPane.showMessageDialog(this, "Member added successfully!");
        } catch (NumberFormatException ex) {
            JOptionPane.showMessageDialog(this, "Please enter valid numeric values for ID and Age.");
        }
    }

    private void updateMember() {
        int selectedRow = table.getSelectedRow();
        if (selectedRow >= 0) {
            try {
                String name = txtName.getText();
                int age = Integer.parseInt(txtAge.getText());
                String membership = cmbMembership.getSelectedItem().toString();
                int id = Integer.parseInt(txtId.getText());

                for (Member m : members) {
                    if (m.id == id) {
                        m.name = name;
                        m.age = age;
                        m.membershipType = membership;
                        break;
                    }
                }

                model.setValueAt(name, selectedRow, 1);
                model.setValueAt(age, selectedRow, 2);
                model.setValueAt(membership, selectedRow, 3);

                JOptionPane.showMessageDialog(this, "Member updated successfully!");
                clearFields();
                txtId.setEnabled(true);
            } catch (NumberFormatException ex) {
                JOptionPane.showMessageDialog(this, "Please enter valid numeric values for Age.");
            }
        } else {
            JOptionPane.showMessageDialog(this, "Please select a member to update.");
        }
    }

    private void deleteMember() {
        int selectedRow = table.getSelectedRow();
        if (selectedRow >= 0) {
            int id = Integer.parseInt(model.getValueAt(selectedRow, 0).toString());

            members.removeIf(m -> m.id == id);
            model.removeRow(selectedRow);

            JOptionPane.showMessageDialog(this, "Member deleted successfully!");
            clearFields();
            txtId.setEnabled(true);
        } else {
            JOptionPane.showMessageDialog(this, "Please select a member to delete.");
        }
    }

    private void clearFields() {
        txtId.setText("");
        txtName.setText("");
        txtAge.setText("");
        cmbMembership.setSelectedIndex(0);
        txtId.setEnabled(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            GymManagementGUI app = new GymManagementGUI();
            app.setVisible(true);
        });
    }
}