samples/javaconstructorbind.js

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// bind on a Java constructor

// See Function.prototype.bind:
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
var bind = Function.prototype.bind;

var URL = Java.type("java.net.URL");

// get the constructor that accepts URL, String parameters.
// constructor signatures are properties of type object.
var newURL = URL["(URL, String)"];

// bind "context" URL parameter.
var TwitterURL = bind.call(newURL, null, new URL('https://www.twitter.com'));

// now you can create context relative URLs using the bound constructor
print(new TwitterURL("sundararajan_a"));

// read the URL content and print (optional part)

var BufferedReader = Java.type("java.io.BufferedReader");
var InputStreamReader = Java.type("java.io.InputStreamReader");

// function to retrieve text content of the given URL
function readTextFromURL(url) {
    var str = '';
    var u = new URL(url);
    var reader = new BufferedReader(
        new InputStreamReader(u.openStream()));
    try {
        reader.lines().forEach(function(x) str += x);
        return str;
    } finally {
        reader.close();
    }
}

print(readTextFromURL(new TwitterURL("sundararajan_a")));