几个比较杂的网站

http://www.233.com/Java/jichu/20100317/09111367-3.html

http://fanyingjie.bokee.com/3550174.html

hibernate源码解析：

http://www.lupaworld.com/code.php?mod=list&itemid=40&path=./hibernate_3.6.1/core/src/main/java/org/hibernate/collection&file=AbstractPersistentCollection.java

深入探讨Iterator模式及Java 5.0中改进的for循环

http://blog.csdn.net/outget1/article/details/5068713