Learning Rhino - 1
Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.
The rhino shell provides a simple way to run scripts in batch mode.
The syntax is:
java org.mozilla.javascript.tools.shell.Main [options] script-filename-or-url [script-arguments]
Example 1:
First of all, download the latest rhino and extract the zip file(for example: c:\rhino1_7R2).
Second, add “c:\rhino1_7R2\js.jar” to the CLASSPATH of your environment.
Third, add a JavaScript file “c:\test.js”, the content is:
print("Hello World!");
Fourth, open CMD window and input following command:
java org.mozilla.javascript.tools.shell.Main c:test.js
the output will be:
Hello World!
OK. We have got the basic concept of Rhino.
Example 2:
1. Open the test.js and modify the content:
for (var i=0; i < arguments.length; i++) { print(arguments[i]);
}
2. Open the CMD window:
java org.mozilla.javascript.tools.shell.Main c:test.js Hello World!
3. Output:
HelloWorld!
Example 3:
1. Modify the test.js:
function add() { var result = 0;
for (var i=0; i < arguments.length; i++) {
result += arguments[i];
}
print(result);
}
add(2, 3, 4);
2. Open the CMD window:
java org.mozilla.javascript.tools.shell.Main c:test.js
3. Output:
9