jfreechart-0.9.13-install

说明：  jfreechart说明文档 需要用JAVA在网页上做统计图的东东，可惜虽是FREE的，但它的文档要收费，这是我好不容易在网上找到的文档，比这里以前那个文档的版本更新,并且以前那个版本在新版本里很多类都有变化，必须用这个文档才有用
(jfreechart documentation needs JAVA done on the website of the Eastern statistics, but although FREE, but it charges to the document, which is on the Internet I finally found the documents, here earlier than that updated versions of the document, and before that version of the new version of many of these categories has changed, this document must be used)