Method main

examples/src/main/java/RunScript3.java:70–106

Main method that evaluates JavaScript code and then accesses JavaScript variables and functions from Java. This method demonstrates advanced JavaScript-Java integration using the Mozilla Rhino engine. After executing JavaScript code, it inspects the JavaScript scope to access variables and call

(String args[])

     *     demonstration of Java-JavaScript variable and function access.
     */
    public static void main(String args[]) {
        Context cx = Context.enter();
        try {
            TopLevel scope = cx.initStandardObjects();

            // Collect the arguments into a single string.
            String s = "";
            for (int i = 0; i < args.length; i++) {
                s += args[i];
            }

            // Now evaluate the string we've collected. We'll ignore the result.
            cx.evaluateString(scope, s, "<cmd>", 1, null);

            // Print the value of variable "x"
            Object x = scope.get("x", scope);
            if (x == Scriptable.NOT_FOUND) {
                System.out.println("x is not defined.");
            } else {
                System.out.println("x = " + Context.toString(x));
            }

            // Call function "f('my arg')" and print its result.
            Object fObj = scope.get("f", scope);
            if (!(fObj instanceof Function)) {
                System.out.println("f is undefined or not a function.");
            } else {
                Object functionArgs[] = {"my arg"};
                Function f = (Function) fObj;
                Object result = f.call(cx, scope, scope.getGlobalThis(), functionArgs);
                String report = "f('my args') = " + Context.toString(result);
                System.out.println(report);
            }
        } finally {
            Context.exit();
        }
    }

    /** Private constructor to prevent instantiation of this utility class. */
    private RunScript3() {