JShell and REPL in Java 9

July 28, 2015 | 1 minute read
Yolande Poirier
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Java 9 introduces JShell and a Read-Eval-Print Loop (REPL) for the Java Programming Language. REPL allows you to evaluate code snippets such as declarations, statements, expressions. You can test your code as you create it, and way before you are done with your whole project.

The JShell Java Enhancement Proposal (JEP) for the project indicated that the new feature is the result of academic feedback. Schools are adopting languages that have REPL functionality because it lowers the initial learning curve of programming. The interactive REPL tool gives rapid evaluation of code to young developers.

In the video below, Jim Connors gives a short demonstration on how you can now use the tool as part of the latest Java 9 build.

Yolande Poirier

Yolande Poirier manages the online experience for the world's biggest IT community. She empowers developers to successfully grow their projects, businesses, and careers. Telling the story of how people use technology, she curates technical content, interviews IT professionals around the world, and write blogs about Java technologies and projects. She is a speaker at international conferences and JavaOne Rock Star, this year's track lead of the developer community day and a long time member of @jduchess, a network of women in Java. She manages @Java, a network of over 350,000 developer enthusiasts.


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