What is the difference between "green" threads and "native" threads?

 http://www.jguru.com/faq/view.jsp?EID=143462

http://www.codestyle.org/java/faq-Threads.shtml#greenthread

http://www.ibm.com/developerworks/cn/java/j-concurrent/

http://tailsherry.iteye.com/blog/176152

http://blog.csdn.net/carryoutvip/article/details/5536506

http://www.cnblogs.com/jobs/archive/2007/04/18/717583.html