实现LRU算法的Cache源代码，可以用来支持整个系统中某种对象数量的个数限制，同时，通过LRU算法保证使用频度高的对象尽可能的驻留内存。

该算法可以用来支持J2EE系统性能提升，同时又可以控制内存安全使用。-LRU algorithm implementation Cache source code, can be used to support the system as a whole number of objects in a certain number of restrictions, at the same time, through the LRU algorithm to ensure that the use of high frequency of memory-resident object, as far as possible.

The algorithm can be used to support the J2EE system performance, but also can control the memory safe to use.