QuickShell is an Eclipse plugin to use Java JShell (REPL) inside Eclipse IDE.
JDK 9+ is not installed on your system? No worries, you can still use QuickShell using external unzipped JDK. So without disturbing your existing project setup, you can use QuickShell.

There are multiple ways to install this plugin:

• Download from Eclipse marketplace:

• Install using Eclipse update site: Go to following page and follow instructions: https://nileshkhaire.github.io/QuickShell/update/

• Download plugin JAR file and put into your Eclipse plugin directory "$ECLIPSE_HOME/plugins" . Restart eclipse.

Note : QuickShell is depends on Eclipse 'TM Terminal' plugin. If it is already not install in your Eclipse (Press Ctrl+Alt+T to check) , please download from Eclipse Marketplace. Without this plugin some features of QuickShell will not work. Check this Question for more

• Go to Eclipse menu, Window -> Preferences -> QuickShell Settings and click on browse to select jshell executable present in JDK installation directory.(JDK 9+) ( jshell.exe in Windows). See screenshot below :

Note : Even though you are using older JDK for running eclipse, you can still use this plugin by using external JDK. For this you can download JDK9+ from https://jdk.java.net/archive/ unzip it somewhere and select path of jshell executable in setting specified above.

Select your existing code in java editor and click on right-click menu QuickShell -> Run as JShell script.

Create a file with extension .jsh. for example test.jsh and right-click on it and click on the pop-up menu QuickShell -> Run JShell Script. Check the screenshot below:

Click on eclipse menu QuickShell -> Start JShell in Eclipse Terminal. This will open jshell in eclipse terminal.

Click on eclipse menu QuickShell -> Start JShell Executable. This will call jshell executable in a separate window. (Note: This is a platform-dependent feature it may not be supported on your operating system or it may not work on your operating system. I have tested on Windows and it is working as expected. I am trying to support other OS in next releases.