In this video I have shown how you can solve the error like the one shown below,
The archive: C:/Users/MIRITPC/Desktop/New folder (5)/New folder/mysql-connector-java-5.0.0-beta-bin.jar which is referenced by the classpath, does not exist.
This error comes if when the jar file is dislocated from the path you added to the class path.
To get the error right click on the Project in Eclipse >> Build path >> Configure Build Path
The jar file will show red marked which is lost from the location
1. Add the Jar file to same old location.
2. Remove the jar from there and add from the new location.
If the classpath could find the jar from the location. Error will be gone.