java.md

Java

Java is available on the cluster. Activate java by loading the Java module

$ ml Java

Note that the Java module must be loaded on the compute nodes as well, in order to run java on compute nodes.

Check for java version and path

$ java -version
$ which java

With the module loaded, not only the runtime environment (JRE), but also the development environment (JDK) with the compiler is available.

$ javac -version
$ which javac

Java applications may use MPI for inter-process communication, in conjunction with Open MPI. Read more on http://www.open-mpi.org/faq/?category=java. This functionality is currently not supported on Anselm cluster. In case you require the java interface to MPI, please contact cluster support.