Send Ember application as response from Java HTTP server?

I'm new to Ember. I'm using Ember for front-end and Java for back-end. On typing localhost:8080, I need to show the Ember homepage index.html. Previously, I used Node.js and the below line did the trick

res.sendfile('./public/index.html');

Now on shifting to Java, I'm unable to achieve the same result. I tried the below code.

public static void main(String[] args) throws Exception 
{
    HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
    server.createContext("/", new HHandler());
    server.createContext("/getbookarray", new MyHandler());
    server.setExecutor(null); // creates a default executor
    server.start();
}

static class HHandler implements HttpHandler 
{
    @Override
    public void handle(HttpExchange t) throws IOException 
    {
        File file = new File("..\\public\\index.html");
        String response = FileUtils.readFileToString(file);
        String encoding = "UTF-8";
        t.getResponseHeaders().set("Content-Type", "text/html; charset=" + encoding);
        t.getResponseHeaders().set("Accept-Ranges", "bytes");
        t.sendResponseHeaders(200, response.length());
        OutputStream os = t.getResponseBody();
        os.write(response.getBytes("UTF-8"));
        os.close();
    } 
}

But, unfortunately I'm getting the below error on trying to load the home page. "Uncaught SyntaxError: Unexpected token <"

The same Ember application when processed using Node.js works fine. I guess I'm not sending the HTTP response properly. Any help is appreciated.