Java8 Nashorn JavaScript engine

Using Java8,nashorn greatly improves the introduction of JavaScript engines to replace the existing Nashorn Java scripting engine. Nashorn provides 2 to 10 times times better performance because it compiles code directly in memory and passes it to bytecode jvm.nashorn using the Invokedynamics function, introduced in JAVA7 to improve performance.

JJs

For the Nashorn engine, JAVA8 introduced a new command-line tool that JJS to the console to execute Java script code.

Interpreting JS Files

Create and save sample.js in the c:> JAVA folder.

Sample.js

Print (' Hello world! ');

Open the console and use the following command.

C:\JAVA>JJS Sample.js

See the results

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Java8 Nashorn JavaScript engine