You have a basic eclipse project. Or maybe the type of project is just not the right one. And what you want is another type. Here is how you turn basic project to java project. This should also work for many other conversions.

Software:

Eclipse Galileo
Eclipse Project

Should also work for:

Any Eclipse
Many Eclipse Project Types

1

Backup

Just copy your project in some location on your disc. You can restore your project if something goes wrong.

2

Delete project from eclipse

Important
1. Remember the exact name of your project.
2. Don’t delete your project from the file system.

3

Create new Java Project

Type the exact name of the project you had removed before.
Eclipse can see that there is such project on the disc and instead of overwriting it, tries its best to create working java project.

4

Do any setup and debug

By now you have your project. Most likely, there are bugs or missing libraries. Fix it.

5

Test it

No bugs? Run it!