AtomicInteger&Unsafe类

目录：

1. [Unsafe类][1]
2. [Unsafe类objectFieldOffset方法][2]
3. [Unsafe类功能][3]
4. [AtomicInteger类][4]
5. [怎么判断一个变量是否线程安全][5]
6. [AtomicInteger类多词getAndDecrement能否保证线程安全][6]
7. [参考资料][7]

1.Unsafe类