JAVA MVC 5 Array

Here is a clean, modular Model-View-Controller (MVC) implementation in Java Swing.

To keep this easy to run and understand, this example is structured in a single file containing all components. However, when working in NetBeans, you would typically split these into separate files (Student.java, StudentView.java, StudentController.java, and Main.java) within the same package.

The MVC Architecture

• Model (Student): Holds the data structure for a student.

• View (StudentView): Handles the UI components (the Swing window, table, and buttons).

• Controller (StudentController): Acts as the bridge, fetching the hardcoded array of 10 students and populating the View.

The Java Code

Java

Main.java

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package mvcstudentapp;


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

// ==========================================
// 1. THE MODEL
// ==========================================
class Student {
    private String studentId;
    private String name;
    private String classroom;

    public Student(String studentId, String name, String classroom) {
        this.studentId = studentId;
        this.name = name;
        this.classroom = classroom;
    }

    // Getters
    public String getStudentId() { return studentId; }
    public String getName() { return name; }
    public String getClassroom() { return classroom; }
}

// ==========================================
// 2. THE VIEW
// ==========================================
class StudentView extends JFrame {
    private JTable studentTable;
    private DefaultTableModel tableModel;
    private JButton loadButton;

    public StudentView() {
        // Window Setup
        setTitle("Student Directory (MVC Pattern)");
        setSize(500, 350);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setLayout(new BorderLayout(10, 10));

        // Table Setup
        String[] columnNames = {"Student ID", "Name", "Classroom"};
        tableModel = new DefaultTableModel(columnNames, 0);
        studentTable = new JTable(tableModel);
        JScrollPane scrollPane = new JScrollPane(studentTable);
        add(scrollPane, BorderLayout.CENTER);

        // Controls Setup
        JPanel panelBottom = new JPanel(new FlowLayout(FlowLayout.CENTER));
        loadButton = new JButton("Load Student Data");
        panelBottom.add(loadButton);
        add(panelBottom, BorderLayout.SOUTH);
    }

    // Update the table with new data
    public void setTableData(List<Student> students) {
        tableModel.setRowCount(0); // Clear existing data
        for (Student student : students) {
            Object[] row = {
                student.getStudentId(), 
                student.getName(), 
                student.getClassroom()
            };
            tableModel.addRow(row);
        }
    }

    // Getter for the button to attach listener in Controller
    public JButton getLoadButton() {
        return loadButton;
    }
}

// ==========================================
// 3. THE CONTROLLER
// ==========================================
class StudentController {
    private StudentView view;
    private List<Student> studentList;

    public StudentController(StudentView view) {
        this.view = view;
        this.studentList = new ArrayList<>();
        
        // Initialize 10 sample student data points
        initializeSampleData();

        // Attach action listener to the View's button
        this.view.getLoadButton().addActionListener(e -> {
            view.setTableData(studentList);
        });
    }

    private void initializeSampleData() {
        studentList.add(new Student("STU001", "Alex Mercer", "12-A"));
        studentList.add(new Student("STU002", "Beatrice Vance", "12-B"));
        studentList.add(new Student("STU003", "Charles Xavier", "11-A"));
        studentList.add(new Student("STU004", "Diana Prince", "10-C"));
        studentList.add(new Student("STU005", "Ethan Hunt", "12-A"));
        studentList.add(new Student("STU006", "Fiona Gallagher", "11-B"));
        studentList.add(new Student("STU007", "Garrus Vakarian", "12-B"));
        studentList.add(new Student("STU008", "Hal Jordan", "10-A"));
        studentList.add(new Student("STU009", "Iris West", "11-C"));
        studentList.add(new Student("STU010", "Jack Sparrow", "10-B"));
    }
}

// ==========================================
// MAIN ENTRY POINT
// ==========================================
public class Main {
    public static void main(String[] args) {
        // Set Look and Feel to System Default for a cleaner UI
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception ignored) {}

        SwingUtilities.invokeLater(() -> {
            StudentView view = new StudentView();
            // The Controller links the View and manages the data
            new StudentController(view);
            view.setVisible(true);
        });
    }
}

How to use this in NetBeans: