java.lang.Object cannot be resolved in Eclipse

Question

When I installed the latest installment in Mac OSX - the Mountain Lion - I experienced some problems getting Eclipse to work I also lost most of my Android developer files

Answer 1

My problem was that I had in Eclipse: Window / Preferences... and then in the tree on the left Java / Installed JREs: C:\Program Files\Java\jre7 I changed to: c:\Program Files (x86)\Java\jre7 It solved my problem.

Answer 2

I got this error and what I had to do was remove the JRE from the Window/Preferences/Java/Installed JREs and re-add it. This somehow cleared up eclipse's cache and rebuilt the project successfully. To get rid of the error in the file-editor I also had to close it and open the file once again.

Answer 3

I solved this by pointing my eclipse to the jre available in jdk.

Answer 4

If your project specific (or if not applicable, workspace default) JDK/JRE is being referenced correctly and you've just begun to get this issue out of the blue: restart Eclipse.

Unfortunately, "restart Eclipse" is one of the standard troubleshooting steps when a project won't build. Eclipse even has a dedicated entry under the File menu.

Answer 5

I had this problem, and I understood that Eclipse has automatically imported a core reference, instead of the reference for the project I needed.

Deleted the import, and rearranged it, and everything worked fine.

Answer 6

Same problem facing Me Project->properties->Android
And select the api level and also go in java build path and check some external jar file path if we already add in it.update the jar file path