jjs(1) - phpMan

jjs(1) Basic Tools jjs(1)

NAME
jjs - Invokes the Nashorn engine.

SYNOPSIS
jjs [options] [script-files] [-- arguments]

options
One or more options of the jjs command, separated by spaces. For more information, see
Options.

script-files
One or more script files which you want to interpret using Nashorn, separated by
spaces. If no files are specified, an interactive shell is started.

arguments
All values after the double hyphen marker (--) are passed through to the script or the
interactive shell as arguments. These values can be accessed by using the arguments
property (see Example 3).

DESCRIPTION
The jjs command-line tool is used to invoke the Nashorn engine. You can use it to
interpret one or several script files, or to run an interactive shell.

OPTIONS
The options of the jjs command control the conditions under which scripts are interpreted
by Nashorn.

-cp path
-classpath path
Specifies the path to the supporting class files To set multiple paths, the option can
be repeated, or you can separate each path with a colon (:).

-Dname=value
Sets a system property to be passed to the script by assigning a value to a property
name. The following example shows how to invoke Nashorn in interactive mode and assign
myValue to the property named myKey:

>> jjs -DmyKey=myValue
jjs> java.lang.System.getProperty("myKey")
myValue
jjs>

This option can be repeated to set multiple properties.

-doe
--dump-on-error
Provides a full stack trace when an error occurs. By default, only a brief error
message is printed.

-fv
--fullversion
Prints the full Nashorn version string.

-fx
Launches the script as a JavaFX application.

-h
-help
Prints the list of options and their descriptions.

--language=[es5]
Specifies the ECMAScript language version. The default version is ES5.

-ot
--optimistic-types=[true|false]
Enables or disables optimistic type assumptions with deoptimizing recompilation.
Running with optimistic types will yield higher final speed, but may increase warmup
time.

-scripting
Enables shell scripting features.

-strict
Enables strict mode, which enforces stronger adherence to the standard (ECMAScript
Edition 5.1), making it easier to detect common coding errors.

-t=zone
-timezone=zone
Sets the specified time zone for script execution. It overrides the time zone set in
the OS and used by the Date object.

-v
-version
Prints the Nashorn version string.

EXAMPLES
Example 1 Running a Script with Nashorn

jjs script.js

Example 2 Running Nashorn in Interactive Mode

>> jjs
jjs> println("Hello, World!")
Hello, World!
jjs> quit()
>>

Example 3 Passing Arguments to Nashorn

>> jjs -- a b c
jjs> arguments.join(", ")
a, b, c
jjs>