A Parking system app written in Java with command line interface.
- Java 11
- Maven
For Testing
- JUnit 5
- Mockito
-
Run the jar file via terminal and pass the input file as argument. Open terminal and run the following snippet
cd parking-app java -jar parking-app.jar valid_input.txt -
Import the project in your preferred IDE and run the app. Pass the input file as command line argument.
Positive flow: valid_input.txt Negative flow: invalid_input.txt
3 4
Enter motorcycle SGX1234A 1613541902
Enter car SGF9283P 1613541902
Exit SGX1234A 1613545602
Enter car SGP2937F 1613546029
Enter car SDW2111W 1613549740
Enter car SSD9281L 1613549740
Exit SDW2111W 1613559745
The first line creates a car parking lot of size 3 and motorcycle parking lot of size 4. The app will throw exception for non-positive values.
Enter and Exit are command keywords to park and unpark the vehicle.
Enter command is followed by vehicle type (car or motorcycle), license number and timestamp of entering time.
Exit command is followed by license number and timestamp of exiting time.
Accept MOTORCYCLELOT1
Accept CARLOT1
MOTORCYCLELOT1 2
Accept CARLOT2
Accept CARLOT3
Reject Parking full
CARLOT3 6
Accept will park the vehicle at the specified lot. The lowest Lot Id will be allocated.
Reject occurs when parking is full or vehicle is already parked
Upon Exit, the lot will be released and fare will be calculated. Parking charges are $2/hour for Car and $1/hour for Motorcycle. The hours will be rounded up before calculation.
The app follows the Software Engineering SOLID principles and applies the appropriate design pattern where applicable.
Parking App Class Diagram Large Image
- Add Persistence layer
- Add Dependency Injection with framework like Spring
- Add Interactive Command line Input option
- Add Concurrency with Lock to simulate multiple parking lot entrances and exits