Compiler Error J0057

Class file 'identifier' should not contain class 'identifier'

This compiler did not detect the class specified in the error in the specified class file. This error usually occurs when a class is compiled into a class file that later is renamed. Because the class file has a different name than the class contained inside of it, attempting to use the name of the class file as a class will fail. To avoid this situation you will need to change the class definition to have the correct name or rename the file back to the original class name.