Getting Started - Scripting in Java: Integrating with Groovy and JavaScript - page 5

try {
// Execute the script
engine.eval(script);
}
catch (ScriptException e) {
e.printStackTrace();
}
}
}
Hello Scripting!
Using the jjs Command-line Tool
In the previous section, you saw how use the Nashorn scripting engine from the Java
programs. In this section, I will show you how to perform the same task using the jjs
command-line tool. The tool is stored in the JDK_HOME\bin and JRE_HOME\bin directories.
For example, if you have installed JDK8 in C:\java8 directory on Windows, the path for
the jjs tool will be C:\java8\bin\jjs.exe . The jjs tool can be used to execute Nashorn
script in a file or execute scripts interactively.
The following is an invocation of the jjs tool on a Windows command-prompt. The
script is entered and executed. You can use q uit() or exit() function to exit the jjs tool:
C:\>jjs
jjs> print('Hello Scripting!');
Hello Scripting!
jjs> quit()
C:\>
You may get the following error executing the jjs command:
'jjs' is not recognized as an internal or external command, operable program
or batch file.
The error indicates that the command prompt was not able to locate the jjs tool. In
this case, you can either enter the full path of the jjs tool or add the directory containing
the too in the system PATH.
Consider the code listed in Listing 1-2. It is Nashorn code that uses the print()
function to print a message on the standard output. The code is saved in a file named
helloscripting.js .