Instant feedback, nice! When you use a REPL, you are writing code interactively and executing it without delay. The release of Java 9 in 2016 will deliver a fully functional REPL environment named ...

An REPL is a command-line tool for quickly running statements ... At long last, the edit-compile-run-debug cycle is no longer a stumbling block for writing good Java code. Successful pseudocode ...

Code for the REPL capability has been featured in the Kulia project, and users were speculating on the addition of a REPL into Java last year. The Java Enhancement Proposal detailing jshell says ...