包含三个程序，一个实现读写者问题，一个实现大小写输入的区分，一个实现一个界面上4个面板分别的计时功能。所有的程序都是通过线程实现的。-It contains three programs, read and write by a problem, a case-sensitive input realization, a realization of a four panel interface timing function respectively. All programs are imp