Occasionally, you might find that Eclipse is finding build errors where there were none just moments before. In such a situation, you can try a couple quick Eclipse tricks.
First, try refreshing the project: Simply right-click the project and choose Refresh or press F5. If this doesn't work, try deleting the R.java file, which is found under the gen directory under the name of the particular package being compiled. (Don't worry: This file is created during every compile.) If the Compile Automatically option is enabled, the file is recreated. Otherwise, you need to compile the project again.
Finally, you can try cleaning the project. To do this, choose Project, Clean and choose the projects you want to clean. Eclipse removes all temporary files and then rebuilds the project(s).
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