jjs(1) Basic Tools jjs(1)

# [NAME](#NAME)

jjs - Invokes the Nashorn engine.

# [SYNOPSIS](#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](#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](#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 (:).

-D*name*=*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](#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>


 
```

# [SEE ALSO](#SEE_ALSO)

**jrunscript**

03 March 2015 JDK 8

---

Document: jjs(1) from openjdk-11-openj9 0.61.0-r3 (Chainguard OS)