JShell is a

Java Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...

read-eval-print loop which was first introduced in the JDK 9. It is tracked by JEP 222 ''jshell: The Java Shell (Read-Eval-Print Loop)''. 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 BeanShell is a small, free, embeddable Java source interpreter with object scripting language features, written in Java. It runs in the Java Runtime Environment (JRE), dynamically executes standard Java syntax and extends it with common scripting c ...

, which has been dormant since 2003, and arbitrarily diverged from the Java language.

Example

jshell> int a[] = 
a > int[5] 

jshell> int fact(int n) 
,   created method fact(int)

jshell> for (int i = 0; i < a.length; ++i)
   ...>     a[i] = fact(a[i]);

jshell> a
a > int[5]

References

Command shells Cross-platform software JDK components Interpreters (computing) {{prog-lang-stub

Example

See also

References