jrunscript-java-23 - Man Page

Note:

This tool is experimental and unsupported.

jrunscript [options] [arguments]

options

This represents the jrunscript command-line options that can be used. See Options for the jrunscript Command.

arguments

Arguments, when used, follow immediately after options or the command name. See Arguments.

The jrunscript command is a language-independent command-line script shell. The jrunscript command supports both an interactive (read-eval-print) mode and a batch (-f option) mode of script execution. By default, JavaScript is the language used, but the -l option can be used to specify a different language. By using Java to scripting language communication, the jrunscript command supports an exploratory programming style.

If JavaScript is used, then before it evaluates a user defined script, the jrunscript command initializes certain built-in functions and objects, which are documented in the API Specification for jrunscript JavaScript built-in functions.

-cp path or -classpath path

Indicates where any class files are that the script needs to access.

-Dname=value

Sets a Java system property.

-Jflag

Passes flag directly to the Java Virtual Machine where the jrunscript command is running.

-l language

Uses the specified scripting language. By default, JavaScript is used. To use other scripting languages, you must specify the corresponding script engine's JAR file with the -cp or -classpath option.

-e script

Evaluates the specified script. This option can be used to run one-line scripts that are specified completely on the command line.

-encoding encoding

Specifies the character encoding used to read script files.

-f script-file

Evaluates the specified script file (batch mode).

-f -

Enters interactive mode to read and evaluate a script from standard input.

-help or -?

Displays a help message and exits.

-q

Lists all script engines available and exits.

If arguments are present and if no -e or -f option is used, then the first argument is the script file and the rest of the arguments, if any, are passed as script arguments. If arguments and the -e or the -f option are used, then all arguments are passed as script arguments. If arguments -e and -f are missing, then the interactive mode is used.

jrunscript
js> print('Hello World\n');
Hello World
js> 34 + 55
89.0
js> t = new java.lang.Thread(function() { print('Hello World\n'); })
Thread[Thread-0,5,main]
js> t.start()
js> Hello World

js>

In this example, the test.js file is the script file. The arg1, arg2, and arg3 arguments are passed to the script. The script can access these arguments with an arguments array.