How to add a java class path in jupyter about notebook HOT 7 CLOSED

@dsblank can you help with this?

from notebook.

Indeed, Calico comes with a Java interpreter. However, this is not just a regular system, and might not be what you want (a generic, standard Java system). This Java interpreter is written in Java, but run by .NET/Mono, to integrate with the rest of Calico.

You will need to install Calico for Mac, Windows, or Linux here:
http://calicoproject.org/Calico_Download

Then, you need to make a kernelspec for Java:
./calico --create-kernelspec --display-name="Calico Java" --nographics --lang=java --only

That will make the calico_java kernelspec. You can then use it from console/qtconsole, or the notebook:

$ ipython console --kernel calico_java
Loading Calico version 4.0.0...
IPython Console 3.1.0
In [1]: x = 1;
In [2]: System.out.println(x);
1

It uses a special form of Java called DynamicJava... types are optional, but you can't change the type once set.

I do plan on making a more standard Java kernel at some point. Also, you might be interested in Calysto Processing, that converts Java to Javascript.

Followup questions and comments to: https://bitbucket.org/ipre/calico/

Thanks!

from notebook.

Sorry, I think I didn't explain well about what I mean.
We already add calico into jupyter and we can load the kernel in the notebook web. We can run java program now, Our question is we don't know how to add a java class path to import our .jar files.
Thank you!

from notebook.

This highlights a bigger issue to me, which is of setting environment variables. Are kernels launched with the same env as the notebook server?

from notebook.

The kernelspec can specify extra environment variables for kernels - these are added to a copy of the notebook server environment variables. If you want to do more complex things (like adding directories to $PATH) the kernelspec can point to a script which modifies its environment variables and then starts the actual kernel.

from notebook.

@liushiqi9 Let's take these questions out of jupyter issue tracker, as this is a specific kernel question. (Briefly, this isn't regular Java, it doesn't sound like you want to integrate with .NET, so this isn't probably what you want. Wait for a real Java kernel.)

from notebook.

How to add a java class path in jupyter ? to use java with scijava-jupyter-kernel

from notebook.