What version of Java does HermesJMS require?

Since 1.12 we recommend you use Java 6 as this is much improved in its performance, especially Swing. If your main Java VM is not 6 then not to worry, however you'll have to manually edit the hermes.bat or hermes.sh scripts to add a line at the start to set the JAVA_HOME environment variable.

We hope to change the installer to let you select this during installation for a future version.