Running Java in Jupyter Notebook

getting-started-with-java-in-jupyter.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "28e28f88-5db7-4cab-b004-7cc3bc745c68",
   "metadata": {},
   "source": [
    "# Running Java using Jupyter notebooks\n",
    "\n",
    "## Requirements\n",
    "\n",
    "- Java JDK >= 9 (1. Install Java >= 9. In my case I installed java using [sdk](https://sdkman.io/). ` $ sdk install java 17.ea.3.pma-open` 2. Verify java version)\n",
    "- Juputer-like enviornment (1. Install a virtual environment using conda `conda create -n ijava python=3.9` 2. Activate the created environment `conda activate ijava` 3. Install jupyter lab `conda install -c conda-forge jupyter-lab`.\n",
    "\n",
    "## Setup\n",
    "\n",
    "- Download the java kernel from [IJava](https://github.com/SpencerPark/IJava) - (`wget https://github.com/SpencerPark/IJava/releases/download/v1.3.0/ijava-1.3.0.zip`) \n",
    "- Unzip the directory\n",
    "- Install the java kernel `python -m install.py --user`\n",
    "- Validate the kernel `jupyter kernelspec list java`\n",
    "\n",
    "## Running\n",
    "- Start the Jupyter lab `jupyter lab`"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1ef5be5d-3e0f-4762-b411-8821d6cbfcff",
   "metadata": {},
   "source": [
    "## Running the Java Code"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "94c4202e-e682-4b99-95bb-e88d71881e11",
   "metadata": {},
   "outputs": [],
   "source": [
    "double a = 4.0;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "28b8d199-1fba-4409-ab88-0db39a4121c0",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "-0.7568024953079282"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Math.sin(a)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "1973aad3-6150-4f31-8200-65c4b230b588",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Hello World This is a jupyter notebook."
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "var sb = new StringBuilder();\n",
    "\n",
    "sb.append(\"Hello World\").append(\" This is a jupyter notebook.\");"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "1a84ad46-fe31-4182-b65e-0633fff94492",
   "metadata": {},
   "outputs": [],
   "source": [
    "var sb = new StringBuilder();"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "cd29bdee-13dc-4c27-8977-003447d88811",
   "metadata": {},
   "source": [
    "## Adding maven dependencies at runtime"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "09867309-47df-493a-a55b-164bb066cfb9",
   "metadata": {},
   "outputs": [],
   "source": [
    "%mavenRepo oss-sonatype-snapshots https://oss.sonatype.org/content/repositories/snapshots/"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "88f8d414-da72-4d6b-9fd5-dc12a76630ad",
   "metadata": {},
   "outputs": [],
   "source": [
    "%maven io.github.spencerpark:jupyter-jvm-basekernel:2.0.0-SNAPSHOT"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "dafa8340-b520-43b6-8b9f-b22024ca9cfe",
   "metadata": {},
   "outputs": [],
   "source": [
    "%jars *.jar"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "8252576c-4518-485b-b4de-210b42e5f204",
   "metadata": {},
   "outputs": [],
   "source": [
    "%%loadFromPOM\n",
    "<repository>\n",
    "  <id>oss-sonatype-snapshots</id>\n",
    "  <url>https://oss.sonatype.org/content/repositories/snapshots/</url>\n",
    "</repository>\n",
    "\n",
    "<repository>\n",
    "  <id>oss-sonatype-releases</id>\n",
    "  <url>https://oss.sonatype.org/content/repositories/releases/</url>\n",
    "</repository>\n",
    "\n",
    "<dependency>\n",
    "  <groupId>io.github.spencerpark</groupId>\n",
    "  <artifactId>jupyter-jvm-basekernel</artifactId>\n",
    "  <version>2.0.0-SNAPSHOT</version>\n",
    "</dependency>\n",
    "\n",
    "<dependency>\n",
    "  <groupId>org.apache.commons</groupId>\n",
    "  <artifactId>commons-math3</artifactId>\n",
    "  <version>3.6.1</version>\n",
    "</dependency>"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "0948ea82-4723-4505-a4be-6d0ca95f3929",
   "metadata": {},
   "outputs": [],
   "source": [
    "%classpath"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "49e8b28b-280f-4e1f-8b0c-81942da84da3",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "80.0"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import org.apache.commons.math3.fraction.*;\n",
    "Fraction.FOUR_FIFTHS.percentageValue()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a1bbf8bb-7473-4318-8c51-0902d8f6b7a5",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Java",
   "language": "java",
   "name": "java"
  },
  "language_info": {
   "codemirror_mode": "java",
   "file_extension": ".jshell",
   "mimetype": "text/x-java-source",
   "name": "Java",
   "pygments_lexer": "java",
   "version": "17-panama+3-167"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}