Cannot save index to 'index' directory, please delete it first

\src into the commandline prompt and received the following: Cannot save index to 'index' directory, please delete it first. Thank you in advance for your help. -Lucene User _ Play free games, earn ti

Cannot save index to 'index' directory, please delete it first

I have met a error like this:"Cannot save index to 'index' directory, please delete it first" when I run the demo in lucene1.9.1. please tell me why? i hava set classpath! -- 『忙忙碌碌 ★ 碌碌无为』 一只小蚂蚁 http://blog.csdn.net/qixiang_nj