Question

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import java.io.FileReader;

public class Main {

    public static void main(String[] args) {

        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("js");
        try {
            FileReader reader = new FileReader("C:/yourfile.js");
            engine.put("urlfromjava", "http://www.something.com/?asvb");
            engine.eval(reader);
            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Right now, the yourfile.js contains this line

function urlget(url)
{
    print("URL:"+url);
    var loc = window.open(url);
    var link = document.getElementsByTagName('a')["61"].href;
    return ("\nLink is: \n"+link); 

}
var x = urlget(urlfromjava);
print(x);

I get the error

"javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "window" is not defined"

How to open a URL and get the links of it from java?

Answer 1

According to the documentation:

The window object represents an open window in a browser.

Since you are not executing your script in a browser, the window object is not defined.

You can read the URL using the URL/URLConnecion classes and feed it to the ScriptEngine. There is a tutorial here.