ConcurrentLinkedQueue Code Explanation

Question

http://www.java2s.com/Open-Source/Java-Open-Source-Library/7-JDK/java/java/util/concurrent/ConcurrentLinkedQueue.java.htm

The above is the source code of ConcurrentL

Answer 1

The condition asks the question "Is the current node the same as the next node?"

If so, you've fallen off list ( documentation in line. )

The basic outline of steps is:

1. create a new node for the offered data.
2. walk the list to find the last node
3. insert new node as new tail.

The other parts of the if statement are handling concurrent modification issues.

To better understand what's going on, read Node.casTail() and the casNext()