Jupyter notebooks

Jupyter notebooks are extremely popular in the Python world, simply because it is great to combine documentation and code in a visually appealing way. Great tool for teaching!

Thanks to the IJava kernel and the JDK 9+ JShell feature, it is possible to run Java within Notebooks without compiling the code now as well.

Installation on Linux#

The following worked on Linux Mint 18.2:

create a directory called weka-notebooks
```
mkdir weka-notebooks
```
change into the directory and create a Python virtual environment:
```
cd weka-notebooks
virtualenv -p /usr/bin/python3.5 venv
```
install Jupyter notebooks and its dependencies:
```
venv/bin/pip install jupyter
```
then download the latest IJava release (at time of writing, this was 1.20) into this directory
unzip the IJava archive:
```
unzip -q ijava*.zip
```
install the Java kernel into the virtual environment, using the IJava installer:
```
venv/bin/python install.py --sys-prefix
```
after that, fire up Jupyter using:
```
venv/bin/jupyter-notebook
```
now you can create new (Java) notebooks!

Installation on Windows (using anaconda)#

open a command prompt
create a new environment using anaconda (e.g., for Python 3.5)
```
conda create -n py35-ijava python=3.5
```
activate environment
```
activate py35-ijava
```
install Jupyter
```
pip install jupyter
```
download the latest IJava release (at time of writing, this was 1.20)
unzip the IJava release (e.g., with your File browser or 7-Zip)
change into the directory where you extracted the release, containing the install.py, e.g.:
```
cd C:\Users\fracpete\Downloads\ijava-1.2.0
```
install the kernel
```
python install.py --sys-prefix
```
start Jupyter
```
jupyter-notebook
```
now you can create new (Java) notebooks!