Method main

examples/src/main/java/RunScript4.java:70–96

Main method that demonstrates creating and using custom JavaScript classes from Java objects. This method shows advanced JavaScript-Java integration by defining a custom JavaScript class (Counter) based on a Java class, creating an instance with initial parameters, and making it available to Jav

(String args[])

     *     reflection errors during class definition.
     */
    public static void main(String args[]) throws Exception {
        Context cx = Context.enter();
        try {
            TopLevel scope = cx.initStandardObjects();

            // Use the Counter class to define a Counter constructor
            // and prototype in JavaScript.
            ScriptableObject.defineClass(scope, Counter.class);

            // Create an instance of Counter and assign it to
            // the top-level variable "myCounter". This is
            // equivalent to the JavaScript code
            //    myCounter = new Counter(7);
            Object[] arg = {Integer.valueOf(7)};
            Scriptable myCounter = cx.newObject(scope, "Counter", arg);
            scope.put("myCounter", scope, myCounter);

            String s = "";
            for (int i = 0; i < args.length; i++) {
                s += args[i];
            }
            Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
            System.err.println(Context.toString(result));
        } finally {
            Context.exit();
        }
    }

    /** Private constructor to prevent instantiation of this utility class. */
    private RunScript4() {