Ahmeth4n java'da internete istek kütüphanelerini tam bilmiyorum ama bulabildiklerim bunlar

Stackoverflow
https://stackoverflow.com/questions/2793150/using-java-net-urlconnection-to-fire-and-handle-http-requests

https://stackoverflow.com/questions/3152138/what-are-the-pros-and-cons-of-the-leading-java-html-parsers

Java Dökümanları
http://docs.oracle.com/javase/tutorial/networking/urls/readingWriting.html
http://docs.oracle.com/javase/6/docs/api/java/net/URLConnection.html
http://docs.oracle.com/javase/6/docs/api/java/net/URL.html