import java.net.URLConnection;

import java.net.HttpURLConnection;

import java.io.InputStream;

import java.net.URL;

import java.util.List;

import java.util.Map.Entry;

import java.io.BufferedReader;

import java.io.InputStreamReader;

class HttpURLConnectionCoreTest{

public static void main(String args[]) throws Exception{

// format = https://www.google.com.bd/?#q=query

/*

String url = "http://www.google.com";

String charset = "UTF-8";

URLConnection connection = new URL(url).openConnection();

connection.setDoOutput(true);

connection.setRequestProperty("Accept-Charset",charset);

connection.setRequestProperty("Content-Length", Integer.toString(1024));

connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=" + charset);

System.out.println(connection.toString());

InputStream response = connection.getInputStream();

HttpURLConnection httpconnection = (HttpURLConnection) new URL(url).openConnection();

httpconnection.setRequestMethod("POST");

int status = httpconnection.getResponseCode();

System.out.println(status);

*/

// format = https://www.google.com.bd/?#q=query

String url = "https://www.google.com/";

String query = "android";

URLConnection connection = new URL(url + "?#q=" + query).openConnection();

// for chrome 41

// http://www.useragentstring.com/pages/Chrome/

connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36");

connection.setRequestProperty("Accept-Charset", "UTF-8");

InputStream response = connection.getInputStream();

String contentType = connection.getHeaderField("Content-Type");

String charset = null;

for (String param : contentType.replace(" ", "").split(";")) {

if (param.startsWith("charset=")) {

charset = param.split("=", 2)[1];

break;

}

}

if (charset != null) {

try (BufferedReader reader = new BufferedReader(new InputStreamReader(response, charset))) {

for (String line; (line = reader.readLine()) != null;) {

System.out.println(line);

}

}

}

/*

String contentType = connection.getHeaderField("Server");

System.out.println(contentType);

for(Entry<String, List<String> > header : connection.getHeaderFields().entrySet()){

System.out.println(header.getKey() + "=" + header.getValue());

}

*/

}

}