A project with that name already exists in the workspace（小常识）

我们在使用Eclipse时会出现如下问题

I'm new to Eclipse/Java/Android

I have already created this project, but I wanted to start over.

1. deleted the HelloAndroid folder from my workspace folder
2. restarted Eclipse
3. now I can't create a project with the same name, because Finish is greyed out, and it gives me the following message: A project with that name already exists in the workspace eclipse

How can I completely delete my old HellowAndroid project from Eclipse?

就是说我将已经创建的一个工程的文件夹删除，而我又想要重新创建一个相同名称的工程

这是会提示我们你已经有一个同名的工程，进而无法创建

我们需要在Window->Show View->Project Explorer，右键Delete你刚才的工程，之后便可以创建

另外你也可以通过点击close project把隐藏的项目显示出来