Java Environment

This notebook describes and creates the Java environment in Nextjournal. Check out the showcase if you want to see what the environment contains. To see how it’s built, see setup.

Showcase

Maven dependencies can be loaded at runtime. Additional Jupyter 'magics' are documented here.

%maven org.knowm.xchart:xchart:3.5.2
import org.knowm.xchart.*;
double[] xData = new double[] { 0.0, 1.0, 2.0 };
double[] yData = new double[] { 3.0, 4.0, 3.0 };
XYChart chart = QuickChart.getChart("Sample Chart", "X", "Y", "y(x)", 
                                    xData, yData);
BitmapEncoder.getBufferedImage(chart);
1.3s
Java Test (Java)
Java

Setup

Build the IJava Environment

url="https://github.com/SpencerPark/IJava/releases/download/v${IJAVA_VERSION}/ijava-${IJAVA_VERSION}.zip"
wget -q --show-progress --progress=bar:force -P /results $url
1.8s
Java (Bash)
Jupyter Base
ijava-1.3.0.zip
file="graalvm-ce-java${JAVA_VERSION}-linux-amd64-${GRAAL_VERSION}.tar.gz"
path="graalvm/graalvm-ce-builds/releases/download/vm-${GRAAL_VERSION}/${file}"
url="https://github.com/${path}"
wget -q --show-progress --progress=bar:force -P /results $url
19.0s
Java (Bash)
Jupyter Base
graalvm-ce-java11-linux-amd64-19.3.1.tar.gz
mkdir $GRAAL_DIR
tar -zxf 
graalvm-ce-java11-linux-amd64-19.3.1.tar.gz
 \
  -C $GRAAL_DIR --strip-components=1
13.0s
Java (Bash)
Jupyter Base
java -version
1.0s
Java (Bash)
Jupyter Base
gu install native-image
3.0s
Java (Bash)
Jupyter Base
cd /tmp
unzip 
ijava-1.3.0.zip
0.9s
Java (Bash)
Jupyter Base
cd /tmp
python3 install.py --sys-prefix
1.6s
Java (Bash)
Jupyter Base
jupyter kernelspec list
1.1s
Java (Bash)
Jupyter Base
rm -rf /tmp/*
0.1s
Java (Bash)
Jupyter Base
du -hsx /
1.1s
Java (Bash)
Jupyter Base

Test

String helloWorld = "Hello world!";
helloWorld;
0.2s
Java Test (Java)
Java
Hello world!
Runtimes (2)
Runtime Languages (1)