http://www.ibm.com/developerworks/cn/java/j-concurrent/
JAVA中的线程 并发
http://java.chinaitlab.com/line/373702.html
java.util.concurrent 中的CountDownLatch一个很好的示例 http://eyesmore.iteye.com/blog/284059
http://vvggsky.iteye.com/blog/306091 这个是CyclicBarrier
http://hollowinheart.iteye.com/blog/540231 用多线程打印abcabcabc....很赞的例子!!!