JShell is an interactive java shell tool introduced in Java 9 and allows us to execute code snippets, and shows the result immediately without declaring the main() method like Java. It is a REPL (Read-Evaluate-Print- Loop) tool and runs from the command-line prompt. We can create variables, methods, classes, scratch variables, external libraries, and etc using JShell
In the below code snippet, we can create a thread by extending the Thread class.
C:\Users\User>jshell | Welcome to JShell -- Version 9.0.4 | For an introduction type: /help intro jshell> class ThreadTest extends Thread { ...> public void run() { ...> System.out.println("Thread in run() method"); ...> } ...> public static void main(String args[]) { ...> ThreadTest t = new ThreadTest(); ...> t.start(); ...> } ...> } | created class ThreadTest
In the below code snippet, the console prints "Thread in run() method" as an output to the user.
jshell> new ThreadTest().run(); Thread in run() method