Here you can find the source of createConnection(URL url, Proxy proxy)
public static HttpURLConnection createConnection(URL url, Proxy proxy) throws IOException
//package com.java2s; /*// ww w .j av a2s . com * Hello Minecraft!. * Copyright (C) 2013 huangyuhui <huanghongxun2008@126.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see {http://www.gnu.org/licenses/}. */ import java.io.IOException; import java.net.HttpURLConnection; import java.net.Proxy; import java.net.URL; public class Main { public static HttpURLConnection createConnection(URL url, Proxy proxy) throws IOException { HttpURLConnection con = (HttpURLConnection) url.openConnection(proxy); con.setRequestProperty("User-Agent", "Hello Minecraft!"); con.setDoInput(true); con.setUseCaches(false); con.setConnectTimeout(15000); con.setReadTimeout(15000); return con; } }