How to load .js files into a Rhino context in Java

Question

Here is my situation:

I have access to a Rhino Context object in a Java class. I want to read in a bunch of .js files and pass them along to the Rhino context to ha

Answer 1

Are you aware that Rhino ships in Java 6?

String javaScriptExpression = "sayHello(name);";
Reader javaScriptFile = new StringReader(
    "function sayHello(name) {\n"
        + "    println('Hello, '+name+'!');\n" + "}");

ScriptEngineManager factory = new ScriptEngineManager();
ScriptEngine engine = factory
    .getEngineByName("JavaScript");
ScriptContext context = engine.getContext();
context.setAttribute("name", "JavaScript",
    ScriptContext.ENGINE_SCOPE);

engine.eval(javaScriptFile);
engine.eval(javaScriptExpression);

If you want to use it with Java 5, you'll have to download the API separately. You can get engines for many popular scripting languages from scripting.dev.java.net.