How do I use Gurobi in an Eclipse Java project?

These instructions work only when you are not using a module file in your Java project. 

On Windows

The Windows instructions were tested with JDK 21 and Eclipse 2024-12 on Feb 21, 2025. 

• First, add the file gurobi.jar to the project:
  • Select Project > Properties > Java Build Path > Libraries.
  • Click "Add External Jars..." to add gurobi.jar. The file, gurobi.jar is in the lib subdirectory of the Gurobi installation.
• Next, add the native libraries to the path for the Run Configuration:
  • Select Project > Properties Run/Debug Settings
  • Select the Launch configuration or create a new one
  • Click Edit ...
  • Select the Environment tab.
  • Set the system environment variable PATH to the absolute location of the bin subdirectory of the Gurobi installation.

On Linux

• First, add the file gurobi.jar to the project:
  • select Project > Properties, select Java Build Path, and select Libraries.
  • Add gurobi.jar as an External JAR; the file gurobi.jar is in the lib subdirectory of the Gurobi installation.
• Next, add the native libraries to the path for the Run Configuration
  • Select the Run Configuration and select the Environment tab.
  • Set the system environment variable LD_LIBRARY_PATH to the absolute location of the lib subdirectory of the Gurobi installation.

On MacOS

• No special configuration is necessary with the default installation of Gurobi Optimizer.

Further information

• How do I resolve the error NoClassDefFoundError?
• How do I avoid an out-of-memory condition while using the Java API?