JShell is a Java read-eval-print loop which was first introduced in the JDK 9.
[1] It is tracked by JEP 222 jshell: The Java Shell (Read-Eval-Print Loop).
[2] One reason why JShell was proposed for Java 9 is the lack of a standard interactive environment for the language; the de facto library to use a Java REPL was often BeanShell, which has been dormant since 2003, and arbitrarily diverged from the Java language.
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