Cmsc 335 Project 3 Overview I This Project You Will Construc

Cmsc 335 Project 3overviewin This Project You Will Construct A Java Sw

Construct a Java Swing GUI that uses event handlers, listeners, and incorporates Java’s concurrency functionality and threads. The GUI should display current time in 1-second intervals, real-time traffic light status for three intersections, and the position and speed of up to three cars as they traverse each intersection. The components should run in separate threads, with buttons to start, pause, stop, and continue the simulation. The simulation involves straight-line travel between traffic lights, assumed units, and the ability to add cars and intersections via the GUI. All assumptions and limitations should be documented. Source code files, UML class diagram, user guide, test plan with evidence, lessons learned, and relevant documentation must be submitted in a zipped file according to specified format and requirements.

Sample Paper For Above instruction

The increasing complexity of urban transportation demands effective tools for monitoring and managing traffic flow. Developing a Java Swing GUI application that simulates traffic at multiple intersections provides not only a visual aid for traffic analysts but also a platform for testing traffic management strategies. This paper discusses the design, implementation, and testing of such a simulation, focusing on the use of Java’s concurrency mechanisms and event-driven programming paradigm.

The core objective of this project was to create an interactive, real-time simulation of traffic signals and vehicle movements across three major intersections. The GUI was designed to include separate panels for displaying current timestamps, traffic light statuses, and vehicle positions and speeds. The architecture leverages Java's multithreading capabilities to run each of these components asynchronously, ensuring a responsive and accurate simulation environment. The concurrency allows for simultaneous updates of time, traffic lights, and vehicle data, which is critical for realistic modeling.

To implement concurrency, the design employed Java’s Thread class and the Executor framework for thread management. Each component—time display, traffic lights, and car movements—was encapsulated within its own thread, ensuring they operated independently yet cohesively. Event handlers attached to control buttons enabled users to start, pause, and stop the simulation seamlessly. These controls managed thread states, allowing for a flexible and user-friendly interface. The start button initiates all threads, pause halts their execution, and stop terminates them, resetting the simulation state.

Vehicle modeling used basic kinematic formulas, with the assumption of straight-line motion between intersections. The distance between lights was set to 1000 meters, with cars traveling at user-defined speeds. The model simplifies physics by assuming cars stop immediately at red lights, continue through yellow and green, and do not undergo acceleration or deceleration. These assumptions streamline the simulation while allowing for effective visualization of traffic flow and signal operation. Additional cars and intersections could be added dynamically through the GUI, enhancing scalability.

The GUI's layout was carefully planned to ensure clarity, with distinct panels for each component. The timestamp panel updates every second, synchronized with the clock thread. Traffic lights are animated to change states based on a timer, reflecting real-world operation. Vehicles are represented by markers whose positions update in real-time based on their speeds and distances traveled. The GUI provides buttons for users to control the simulation loop, with responsive updates driven by thread communication mechanisms such as synchronized blocks and wait/notify calls.

Testing involved multiple phases, including unit testing of individual components, integration testing of concurrent threads, and system testing to validate overall functionality. Each component’s behavior was verified under various scenarios, including starting, pausing, resuming, and stopping the simulation. Sample input data for vehicle speeds and traffic light durations were used, with results documented through screenshots and descriptive logs. The simulation’s accuracy was evaluated by comparing expected vehicle positions and traffic signal changes against computed outcomes, confirming the correctness of thread synchronization and data updates.

The project also identified certain limitations, such as the simplified physics model and static units of measurement. Future enhancements could include more detailed vehicle dynamics, traffic density modeling, and integration with real-time traffic data feeds. The development process emphasized modular design, code readability, and thorough documentation, including UML diagrams illustrating class relationships. Lessons learned highlighted the importance of managing thread safety and ensuring GUI responsiveness through careful event handling and synchronization.

References

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