Java embed javascript code

Demo.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.mozilla.javascript.Context;
import org.mozilla.javascript.Function;
import org.mozilla.javascript.Scriptable;

/*
requirement lib: https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rhino/Download_Rhino
ref: https://vec.io/posts/embed-javascript-in-android-java-code-with-rhino
*/
public class Demo {
	
	public static String getHTML(String urlString) {
	    HttpURLConnection conn;
	    BufferedReader rd;
	    StringBuilder result = new StringBuilder();
	    try {
	    	URL url = new URL(urlString);
	        conn = (HttpURLConnection) url.openConnection();
	        conn.setRequestMethod("GET");
	        rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
	        String line = null;
	        while ((line = rd.readLine()) != null) {
	           result.append(line);
	        }
	        rd.close();
	     } catch (IOException e) {
	        e.printStackTrace();
	     } catch (Exception e) {
	        e.printStackTrace();
	     }
	     return result.toString();
	}
	
	public static Object[] convertJSParams(String... params) {
		Object[] obj = params;
		return obj;
	}
	
	public static String runJavascript(String tag, String sourceCode, String functionName, Object[] functionParams) {
		String result = null;
	    Context rhino = Context.enter();
        rhino.setOptimizationLevel(-1);
        try {
            Scriptable scope = rhino.initStandardObjects();
            rhino.evaluateString(scope, sourceCode, tag, 1, null);
            Function function = (Function) scope.get(functionName, scope);
            Object obj = function.call(rhino, scope, scope, functionParams);
            result = Context.toString(obj);
        } finally {
            Context.exit();
        }
	    return result;
	}
	
	public static void main(String[] args) {
		String TAG = "main";
		String youtubeLiveURL = "https://www.youtube.com/watch?v=s5Vj3VKOZGc";
		String html = getHTML(youtubeLiveURL);
		//String escape = html.replace("\"", "'");
		String jsCode = "function test(a, b) {return a * b;}";
		String jsCode2 = 
			"function getLiveUrl(data) {" +
			"var h = data.indexOf('hlsvp') + 8," +
			"e = data.indexOf('m3u8') + 4;" +
			"return data.slice(h, e);}";
		
		String result = runJavascript(TAG, jsCode2, "getLiveUrl", convertJSParams(html));
		System.out.println(result);
	}
}