java9_kernel's Introduction

java9_kernel

An ipython kernel for java 9

Expectation Setting

This is an experimental ipython kernel written with an experimental repl written for a unreleased java version. Don't expect this to be production ready.

That being said. File issues and I'll do my best.

##Requirements

Install java9

Find or build yourself a kulla.jar

Out of date build guide

This link has a link to the jar

This kernel expects two environment variables defined, which can be set in the kernel.json (described below):

KULLA_HOME - The full path of kulla.jar

JAVA_9_HOME - like JAVA_HOME but pointing to a java 9 environment

##Installing the kernel

Assuming you have cloned the repo and got all the requirements above setup

edit kernel.json replacing PATH_TO_javakernel to the location of the javakernel directory

mkdir ~/.ipython/kernels/java/

cp <location of your edited kernel.json> ~/.ipython/kernels/java/

For example a kernel.json might look like this:

{
 "argv": ["python3", "/Users/bachmann/Code/java9_kernel/javakernel",
          "-f", "{connection_file}"],
 "display_name": "Java 9",
 "language": "java"
 "env" : {
     "JAVA_9_HOME": "/Users/bachmann/Code/jdk1.9.0",
     "KULLA_HOME": "/Users/bachmann/Code/kulla.jar"
     }
 }

If all worked you should be able to run the kernel:

 ipython console --kernel java
Jupyter Console 4.0.2

[ZMQTerminalIPythonApp] Loading IPython extension: storemagic
java version "1.9.0-ea"
Java(TM) SE Runtime Environment (build 1.9.0-ea-b71)
Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-ea-b71, mixed mode)

In [1]: System.out.println("OMG")
 System.out.println("OMG")
OMG

It should work in a notebook as well:

Recommend Projects