JRUNSCRIPT(1) JDK Commands JRUNSCRIPT(1)
NAME
jrunscript - run a command-line script shell that supports interactive
and batch modes
SYNOPSIS
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.
DESCRIPTION
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 de-
fault, 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 program-
ming style.
If JavaScript is used, then before it evaluates a user defined script,
the jrunscript command initializes certain built-in functions and ob-
jects, which are documented in the API Specification for jrunscript
JavaScript built-in functions.
OPTIONS FOR THE JRUNSCRIPT COMMAND
-cp path or -classpath path
Indicates where any class files are that the script needs to ac-
cess.
-Dname=value
Sets a Java system property.
-Jflag Passes flag directly to the Java Virtual Machine where the jrun-
script 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 -class-
path 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 stan-
dard input.
-help or -?
Displays a help message and exits.
-q Lists all script engines available and exits.
ARGUMENTS
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.
EXAMPLE OF EXECUTING INLINE SCRIPTS
jrunscript -e "print('hello world')"
jrunscript -e "cat('http://www.example.com')"
EXAMPLE OF USING SPECIFIED LANGUAGE AND EVALUATE THE SCRIPT FILE
jrunscript -l js -f test.js
EXAMPLE OF INTERACTIVE MODE
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>
RUN SCRIPT FILE WITH SCRIPT ARGUMENTS
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.
jrunscript test.js arg1 arg2 arg3
JDK 21 2023 JRUNSCRIPT(1)
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