Cannot find the class file for java.lang.Object

Question

I reinstalled my eclipse. and then imported all the projects in the Eclipse, but every project has a common error:

Cannot find the class file for java.lang.Object.

Answer 1

Try this:

Go to Build Path -> Libraries -> Add Library -> JRE System Library -> Select JRE

I am not sure but you might be missing JRE System Library in your project, this does not happen often but it is possible.