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System Architecture

MatriculaUniPoo is a Java Swing desktop application built using a two-tier architecture pattern, separating the presentation layer (GUI) from the business logic layer.

Architecture Layers

The application follows a clear separation of concerns between the user interface and business logic, making it maintainable and scalable.

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Package Structure

The application is organized into two main packages:

igu Package

Contains all GUI components and user interface frames

logica Package

Houses business logic classes and data models

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Directory Layout

src/main/java/
├── igu/
│   ├── Inicio.java        # Welcome screen
│   ├── Registrar.java     # Student registration form
│   ├── Login.java         # Authentication screen
│   └── Matricula.java     # Course enrollment interface
└── logica/
    ├── Main.java          # Application entry point
    ├── Alumno.java        # Student data model
    └── Cursos.java        # Course data model

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Application Flow

The application follows a sequential screen flow for student registration and course enrollment:
1

Welcome Screen

The Inicio frame displays the university welcome message with a registration button
2

Student Registration

Students enter their personal information (name, apellido, DNI, and password) in the Registrar frame
3

Authentication

The Login frame validates student credentials against the registered information
4

Course Enrollment

After successful login, the Matricula frame allows students to select and enroll in courses

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Entry Point

The application starts from the Main class in the logica package:
logica/Main.java
package logica;

import igu.Inicio;

public class Main {
    public static void main(String[] args) {
        Inicio in = new Inicio();
        in.setVisible(true);
        in.setLocationRelativeTo(null);
    }
}
The setLocationRelativeTo(null) method centers the window on the screen.
The application uses a frame-switching navigation pattern where screens are hidden and shown rather than created and destroyed: 
// Example from Inicio.java:74
private void btnRegistrarseActionPerformed(java.awt.event.ActionEvent evt) {
    registrate.setIni(this);
    registrate.setVisible(true);
    registrate.setLocationRelativeTo(null);
    this.setVisible(false);
}
This navigation approach maintains state across screens and provides smooth transitions. Each frame holds references to related frames and uses setter methods to maintain bidirectional navigation.

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Key Architectural Patterns

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1. MVC-Inspired Separation

The Alumno and Cursos classes in the logica package represent the data models with getters and setters for all properties.

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2. Frame Reference Management

Each frame maintains references to related frames for navigation:
igu/Registrar.java
private Inicio ini;
private Login log;
Alumno alu = new Alumno();

public void setIni(Inicio ini) {
    this.ini = ini;
}

public void setLog(Login log) {
    this.log = log;
}
Frame references are set before navigation to ensure bidirectional communication between screens.

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3. Data Passing Between Frames

Student credentials are passed from registration to login using constructor parameters:
igu/Registrar.java:207
private void btnRegistrarseActionPerformed(java.awt.event.ActionEvent evt) {
    String nombre = txtNombre.getText();
    String apellido = txtApellido.getText();
    String dni = txtDni.getText();
    String contra = txtContra.getText();
    
    if (nombre.isEmpty()) {
        JOptionPane.showMessageDialog(this, "COMPLETE SU NOMBRE", 
            "Advertencia", JOptionPane.WARNING_MESSAGE);
    } else if (apellido.isEmpty()) {
        JOptionPane.showMessageDialog(this, "COMPLETE SU APELLIDO", 
            "Advertencia", JOptionPane.WARNING_MESSAGE);
    } else if (dni.isEmpty()) {
        JOptionPane.showMessageDialog(this, "COMPLETE SU DNI", 
            "Advertencia", JOptionPane.WARNING_MESSAGE);
    } else if (contra.isEmpty()) {
        JOptionPane.showMessageDialog(this, "COMPLETE SU CONTRASEÑA", 
            "Advertencia", JOptionPane.WARNING_MESSAGE);
    } else {
        JOptionPane.showMessageDialog(null, "REGISTRO EXITOSO");
        log = new Login(dni, contra);
        log.setRegis(this);
        log.setVisible(true);
        log.setLocationRelativeTo(null);
        this.setVisible(false);
    }
}

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Color Scheme

The application uses a consistent color palette across all screens:
ComponentColorRGB Value
Primary BackgroundDark Teal0, 68, 68
Secondary BackgroundTeal0, 153, 153
TextWhite255, 255, 255
Input TextBlack0, 0, 0
AccentLight Cyan0, 204, 204
The consistent color scheme provides a professional and cohesive user experience throughout the application.

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Technology Stack

  • Language: Java
  • GUI Framework: Java Swing
  • Layout Managers:
    • AbsoluteLayout (NetBeans lib.awtextra)
    • GroupLayout
  • IDE: NetBeans (evidenced by auto-generated GUI code)
  • Data Structures: ArrayList for course management
  • UI Components:
    • JFrame, JPanel, JButton
    • JTextField, JPasswordField
    • JLabel, JSeparator
    • JComboBox, JTable
    • DefaultTableModel

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Next Steps

GUI Components

Explore detailed documentation of all user interface components

Data Models

Learn about the Alumno and Cursos class structures

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