JShell is a UNIX-like shell written in Java, and intended primarily for working with Java programs. It can be used in conjunction with any JDK 1.1.x JVM. The reason for writing JShell was to overcome the difficulties in working with Java on Psion's 5mx.

JShell's features include:

• Directory commands: ls, cd, pushd, popd, dirs, etc.
• Java compilation and execution: Compilation is done using javac.
• Piping and redirection
• Examine and set environment variables
• Support for background jobs: Run jobs in the background; kill background jobs.
• Command recall: history, !!, !.

Here are some examples of what you can do with JShell.

Here is more complete documentation.

If you haven't yet gotten Java running on your 5mx, check out John Davies' web site on the topic.

Follow one of these links to download JShell:

• EPOC sis file. This file is an EPOC sis file compressed inside a Windows zip file. After unzipping, install JShell on the D drive on your 5mx, if you have one.
• Windows zip file.
• UNIX gzipped tar file.

JShell is an open-source project. The software is protected by the GNU General Public License. If you want to work on JShell, here is the source.

The current version of JShell is 0.2. Here is the version history.