新京报讯 据@畅游公园 消息，为确保市民游客安全游园，北京市公园管理中心提示：未预约、勿前往。请大家合理安排假日行程开发者_如何学编程，按预约时段来园游览。
I wrote my Java application in Eclipse. Now I would like to generate a .jar file which can be run on other systems from the command line. Is there a easy way to do it in Eclipse?
加载中,请稍侯......