Hi Alexander,
Thanks for replying me. I am particularly interested in running Spark code
written in Java on Zeppelin Notebook.
On Sunday, November 20, 2016 11:06 AM, Alexander Bezzubov <[email protected]>
wrote:
Good question :)
Actually, there is a not very well known yet "hack" (I talked about it a bit on
ApacheCon this year) - to run a pure Java paragraph in Apache Zeppelin - you
can just use `%beam` interpreter!
Beam interpreter uses Beam Java API, so you can leverage it i.e to run WEKA
machine learning library (pure Java) in Zeppelin as below
```%beam
import java.io.BufferedReader;import java.io.FileReader; import
weka.classifiers.Classifier;import weka.classifiers.lazy.IBk;import
weka.core.Instance;import weka.core.Instances;import weka.core.Instances;
public class KNN {
public static void main(String[] args) throws Exception { BufferedReader
datafile = new BufferedReader(new FileReader("/home/ubuntu/ads-weka.txt"));
Instances data = new Instances(datafile);
data.setClassIndex(data.numAttributes() - 1); //do not use first and second
Instance first = data.instance(2); Instance second = data.instance(3);
data.delete(2); data.delete(3); Classifier ibk = new IBk();
ibk.buildClassifier(data); double class1 = ibk.classifyInstance(first); double
class2 = ibk.classifyInstance(second); System.out.println("first: " + class1 +
"\nsecond: " + class2); }}```
It will compile the code the classes and execute it.
You just need to remember to build Zeppelin with `-Pbeam` (may be can be added
to the release convenience binary as well?)
--Alex
On Sun, Nov 20, 2016 at 11:42 AM, DuyHai Doan <[email protected]> wrote:
Or wait for Java9, there will be a REPL for Java
On Sun, Nov 20, 2016 at 11:40 AM, Felix Cheung <[email protected]>
wrote:
I think you will need to convert Java code into Scala syntax? But Scala can
call into Java libraries and so on.
I don't think we have an interpreter for Java since it does not come with a
REPL until Java 9?
From: Abhisar Mohapatra <[email protected]>
Sent: Thursday, November 17, 2016 9:23:24 AM
To: [email protected]; Muhammad Rezaul Karim
Subject: Re: Is it possible to run Java code on Zeppelin Notebook? Yes it will.
I guess there are some implementations too
On Thu, Nov 17, 2016 at 10:41 PM, Muhammad Rezaul Karim <[email protected]>
wrote:
Hi All,
I am a new user of Zeppelin and got to know that Apache Zeppelin is using Spark
as the backend interpreter.
Till date, I have run some codes written in Scala on the Zeppelin notebook.
However, I am pretty familiar with writing Spark application using Java.
Now my question: is it possible to run Java code on Zeppelin Notebook?
Thanks and Regards,
------------------------------ ---
Md. Rezaul Karim
PhD Researcher, Insight Centre for Data Analytics
National University of Ireland Galway
E-mail: [email protected] g
Web: www.insight-centre.org
Phone: +353892311519
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