javahttpurlconnectionurlconnection

Java URLConnection - When do I need to use the connect() method?

I have a problem to understand the meaning of the connect() method in the URLConnection class. In the following code, if I use the connect() method, I get the same result if I don't use it.

Why (or when) do I need to use it?

URL u = new URL("http://example.com");
HttpURLConnection conn = (HttpURLConnection) u.openConnection();

conn.connect();//with or without it I have the same result

InputStream in = conn.getInputStream();
int b;
while ((b = in.read()) != -1) {
 System.out.write(b);
}
Solution 
  • HttpURLConnection conn = (HttpURLConnection) u.openConnection();

    only creates an Object

    connect() method is invoked by conn.getInputStream();