Runtime evaluation: Difference between revisions
New post showing the use of Java's REPL jshell. In addition to an existing post.
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at Evaluator.eval(Evaluator.java:33)
at Evaluator.main(Evaluator.java:21)</pre>
===Java REPL===
Java has a REPL called jshell which can be used for runtime evaluation. It is started by entering the jshell command from the command line. Here is a typical session:
<pre>
C:\Program Files\JDK\bin> .\jshell
| Welcome to JShell -- Version 20
| For an introduction type: /help intro
jshell> double value = 12.0
value ==> 12.0
jshell> value * 3
$2 ==> 36.0
jshell> List<Integer> items = List.of( 1, 2, 3 )
items ==> [1, 2, 3]
jshell> for ( int item : items ) { System.out.print(item * item + " "); }
1 4 9
jshell> void helloWorld() { System.out.println("Hello World"); }
| created method helloWorld()
jshell> helloWorld()
Hello World
jshell> /exit
| Goodbye
</pre>
=={{header|JavaScript}}==
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