Book Image

Learning Jupyter 5 - Second Edition

Book Image

Learning Jupyter 5 - Second Edition

Overview of this book

The Jupyter Notebook allows you to create and share documents that contain live code, equations, visualizations, and explanatory text. The Jupyter Notebook system is extensively used in domains such as data cleaning and transformation, numerical simulation, statistical modeling, and machine learning. Learning Jupyter 5 will help you get to grips with interactive computing using real-world examples. The book starts with a detailed overview of the Jupyter Notebook system and its installation in different environments. Next, you will learn to integrate the Jupyter system with different programming languages such as R, Python, Java, JavaScript, and Julia, and explore various versions and packages that are compatible with the Notebook system. Moving ahead, you will master interactive widgets and namespaces and work with Jupyter in a multi-user mode. By the end of this book, you will have used Jupyter with a big dataset and be able to apply all the functionalities you’ve explored throughout the book. You will also have learned all about the Jupyter Notebook and be able to start performing data transformation, numerical simulation, and data visualization.
Table of Contents (18 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Jupyter Java console


You can run Jupyter in console mode, meaning that command lines can be entered directly rather than in a new Notebook in a browser. The command is as follows:

jupyter console --kernel=java

This means that you can start Jupyter in a console window using the Java kernel. We will see a window like the following one, where we can enter some Java code:

Odd interface lines of the command-line interface screen react as if they are part of a Notebook:

String hello = "Hello, Dan" 
hello 

But this is not normal Java. There are no semicolons at the end of lines. Semicolons are optional for single-line Java statements.

Also, the single line hello is just the reference to the hello variable. I am not sure what is causing this to echo into the output.

 

We can extract this snippet into a Java Notebook with similar results: