INSY 4305 – Advanced Application Development | Java

Java application-development projects focused on object-oriented programming, inheritance, polymorphism, Swing desktop interfaces, file persistence, validation, and custom exception handling.

Core Technologies

Java · OOP · Inheritance · Polymorphism · Interfaces · Java Swing · File I/O · Custom Exceptions

Projects

Employee Management Model

An object-oriented Java application built around an Employee class.

Key concepts:

• encapsulation with private fields
• overloaded constructors
• getters and setters
• salary validation
• object creation and state management
• overridden toString() methods

Java Methods & Calculations

A collection of smaller Java applications built around reusable methods and structured program logic.

Programs include:

• Fahrenheit-to-Celsius conversion table
• test-score average and letter-grade calculator
• menu-driven distance converter
• present-value calculator

Key concepts: methods, parameters, return values, loops, conditionals, formatted output, and Math utilities.

Ship Hierarchy – Inheritance & Polymorphism

An object-oriented ship hierarchy demonstrating advanced Java class design.

Architecture:

• abstract Ship base class
• Displayable interface
• CruiseShip subclass
• CargoShip subclass
• overridden methods
• copy constructors
• polymorphic arrays
• ArrayList<Ship> collections

Key concepts: abstraction, interfaces, inheritance, polymorphism, method overriding, and dynamic dispatch.

Swing Currency Converter

A Java Swing desktop application for converting between multiple currencies.

Key features:

• radio-button currency selection
• image-based interface elements
• formatted conversion results
• popup dialogs
• numeric-input validation
• Clear and Exit controls
• menu bar with About and Exit actions

Key concepts: Swing, event-driven programming, GUI controls, validation, dialogs, and application state.

Cell Phone Inventory System

A multi-window Java Swing application combining authentication, inventory management, persistence, and custom exception handling.

Application components:

• login window
• account-creation window
• cell phone inventory interface
• CellPhone model class
• file-based account and inventory storage
• custom validation exceptions

Custom exceptions:

• InvalidModelException
• InvalidManufacturerException
• InvalidRetailPriceException

Validation includes:

• required manufacturer and model values
• numeric retail-price input
• retail-price range checks
• authentication before inventory access

Skills Demonstrated

• Java application development
• object-oriented design
• encapsulation and class modeling
• inheritance and polymorphism
• abstract classes and interfaces
• method overriding
• arrays and ArrayList
• Java Swing GUI development
• event-driven programming
• multi-window desktop applications
• file input/output
• application state persistence
• custom exception classes
• input validation and error handling

Repository Structure

INSY-4305-Advanced-Application-Development/
├── lab-01-employee-class/
├── lab-02-java-methods/
├── lab-03-inheritance-polymorphism/
├── lab-04-swing-currency-converter/
└── lab-05-cellphone-inventory/

Running the Projects

Java 8+ is recommended.

Example:

cd lab-03-inheritance-polymorphism
javac -d out src/*.java
java -cp out ShipDemo

Each lab contains its own source code and supporting documentation.