The project cannot be built until build path errors are resolved [duplicate]

Question

While compiling an android project in eclipse 3.4.2, I am getting The project cannot be built until the build path errors are resolved.

I got a temporary solution from the blog http://www.scottdstrader.com/blog/ether_archives/000921.html

The resolution was to force a resave of the selected projects (and their .classpath files):

1. Open the project properties
2. Select Java Build Path > Libraries
3. Add a new, arbitrary library (to be deleted later) > OK
4. Wait for the workspace to refresh (or force a refresh of the project)
5. The error(s) will go away
6. Remove the dummy library

The only other references I could find were to make minor alterations of contents of the .classpath file.

Is there any permanent fix for this issue?

Answer 1

Have you tried using Project > Clean... from the menu? This will force a new build on the selected projects in Eclipse.

Answer 2

1-Right CLick on your project folder, Choose Build Path > Configure Build Path
2-Select Libraries Tab and delete any arbitrary library present there.
3-Click on Add Library option, Select JRE System Library and click Next.
4-Choose last Radiobutton option Workspace default JRE and click Finish.
5-press f5 for refresh.
6-run ur program .