Where can I find the source code for Java's HttpURLConnection.getOutputStream()

Question

Where can I find the actual code (be it java or native) that's executed by:

new URL("http://google.com").openConnection().getOutputStream()

Bonus: how I can debug it from IntelliJ IDEA ?

Answer 1

It's part of the JDK (since, er, dunno...): look for a "src.zip" archive within the root folder of your JDK installation.

Answer 2

A quick Google reveals this direct link to HttpUrlConnection and related classes.

You should just be able to point Intellij at the source jar, and it'll tie it in automatically. I don't have Intellij at hand at the moment, but it's pretty trivial.

Answer 3

The URLConnection has a plugin architecture. You can configure different handlers for each protocol. The Sun's default handler for HTTP is

  sun.net.www.protocol.http.HttpURLConnection

This one in turn uses this class to make HTTP calls,

  sun.net.www.http.HttpClient