由于在Java语言提供了线程支持，系统资源的利用率得以提高，系统性能得到改善。文章在分析Java多线程的基础上，对如何实现一个多线程，如何实现同步，进行了简要分析。-Since the Java language provides threading support, improved utilization of system resources, system performance is improved. On the basis of analysis of multi-threaded Java on how to implement a multi-threaded, how to synchronize a brief analysis.