This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Based on the code you showed, you never put a reference to a Sequence object into aStrand[i], so you can't modify the instance variable "sequence" of a nonexistant object. In short, aStrand contains 20 references to null. [ November 13, 2004: Message edited by: Mike Gershman ]