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

A quicker way will be

Right Click Project---> Properties--->Build Path--->Add External Jars--> Find your android-xx.Jar e.g android-17.jar

In my case I'm using the adt and it is here

E:\adt-bundle-windows-x86_64-20130219\adt-bundle-windows-x86_64-20130219\sdk\platforms\android-17

Hope it helps