Background for JSR 166 Based mainly on package EDU.oswego.cs.dl.util.concurrent from http://gee.cs.oswego.edu by Doug Lea APls refactored based on 4+years of usage experience -APIs enhanced to use generics,enumerations Implementations improved to take advantage of -Additional native JVM constructs -New Java Memory Model guarantees(JSR 133)2022-2-27 Institute of Computer Software Nanjing University 12