用Java编写的多线程下载程序，支持断点续传。分多线程下载调度程序，下载线程，合并文件线程，监视线程等-Download programs written in Java multi-threading, support for HTTP. Sub-multi-thread download scheduler, download thread, merge files, threads, monitor thread

使用Java写的电梯调度程序，主要体现的是操作系统的进程，线程的关系-The elevator scheduler written in Java, mainly reflected the relationship of operating system processes, threads