有时候我们导入现有的工程时会出现错误，没有继续下一步的那个按钮，错误提示如下：some projects were hidden because they exist in the workspace directory。
查阅了半天，很多中文网站上也没看到有可行的解释，无意中在一外文网站上看见了，此时显得英语是尤其的重要啊！
导致这个错误的原因是工程重名了！并不是仅仅指文件夹重名，相信很多人也曾经修改过文件夹的名称，可惜没什么用处，关键是修改工程里面的一个文件！也就是.project这个文件！
用记事本打开，修改一下<projectDescription>
<name>projectname</name>中的projectname就行了。
再次导入的话，就OK乐。
鸣谢参考：http://coding.derkeiler.com/Archive/Java/comp.lang.java.programmer/2009-09/msg01365.html
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