Rentamoto

Rentamoto is a small Java desktop application for bike rentals. It uses a simple, non-Maven Java project layout located in the src/ directory and includes UI panels, services, and models.

Project structure

• src/ - Java source code
  • Main.java - Application entry point
  • models/ - Bike, Rental, User data classes
  • services/ - BikeService, RentalService, UserService
  • ui/ - Swing UI panels and frames (LoginFrame, Dashboard, etc.)
  • utils/ - DatabaseConnection, UIHelper
• bin/ - compiled classes (if using run.bat)
• run.bat - convenience batch script to compile/run on Windows
• lib/ - external jars (if any)

Prerequisites

• Windows (PowerShell recommended)
• Java 21 (LTS) or compatible JDK installed. Older JDKs may still work but Java 21 is recommended.

Quick start (compile & run)

Open PowerShell in the project root (D:\Downloads\Rentamoto2\Rentamoto2) and run:

# compile all .java files into bin/ (create bin if missing)
mkdir bin; javac -d bin (Get-ChildItem -Path src -Recurse -Filter '*.java' | ForEach-Object { $_.FullName })

# run the application
java -cp bin Main

Or use the provided run.bat (double-click or run in PowerShell):

.\run.bat

Setting Java 21 on Windows (Recommended)

1. Download and install a Java 21 JDK (e.g., Temurin/Eclipse Adoptium or Oracle).
2. Set JAVA_HOME and update PATH temporarily in PowerShell (session only):

$env:JAVA_HOME = 'C:\Program Files\Java\jdk-21'
$env:PATH = "$env:JAVA_HOME\bin;" + $env:PATH
java -version

For a permanent change, update System Environment Variables via Windows Settings > Advanced system settings > Environment Variables.

Project notes and Java 21 upgrade guidance

• This project is a plain Java project (no Maven/Gradle). Upgrading to Java 21 typically requires:
  • Installing a Java 21 JDK and pointing JAVA_HOME to it.
  • Recompiling sources with javac from the Java 21 JDK.
  • Resolving any deprecated/removed APIs (rare for small Swing apps). Common places to check:
    • src/utils/DatabaseConnection.java — database driver compatibility and JDBC URL

Troubleshooting

• "Could not find or load main class Main" — ensure javac compiled classes into bin and the java -cp bin Main command is run from project root.
• Database connection issues — check src/utils/DatabaseConnection.java for JDBC URL and credentials.
• Missing external JARs — place them in lib/ and add them to the classpath when compiling/running:

# include jars from lib
$libJars = -join ';', (Get-ChildItem lib -Filter '*.jar' | ForEach-Object { $_.FullName })
javac -cp $libJars -d bin (Get-ChildItem -Path src -Recurse -Filter '*.java' | ForEach-Object { $_.FullName })
java -cp "bin;$libJars" Main

Where to look next

• Update run.bat to set JAVA_HOME and classpath automatically for users if desired.
• Add a build script (Ant/Maven/Gradle) to simplify building and dependency management.

Contact

If you want, I can also:

• Create a build.gradle or pom.xml to manage the project and specify Java 21 compatibility.
• Add CI workflow to compile/test the project with JDK 21.