java - HttpsURLConnection: 接続タイムアウト エラー

Question

Google への https 接続を設定し、取得した応答を出力するための簡単なコードがあります。

import java.io.OutputStreamWriter;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;


public class SendCertReq 
{
public static void main(String[] args) throws Exception 
{
     URL url = new URL("https://www.google.co.in/");
     HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
     conn.setRequestMethod("GET");
     conn.setDoOutput(true);
     OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
     wr.close();
     System.out.println(conn.getResponseMessage());
}
}

実行しようとすると、次のエラーが表示されます。

Exception in thread "main" java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(Unknown Source)
at SendCertReq.main(SendCertReq.java:16)

誰でも私を案内してください。私はそれを理解しようとして朝から頭を食べていました。