fixed warnings and errors related to unused import, scope of variables, need bracers, parameters should be final, only one return, method is not designed for extension.
fixed warnings and errors related to unused import, scope of variables, need bracers, parameters should be final, only one return, method is not designed for extension.
fixed warnings related to 'parameters should be final'
fixed warnings and errors related to unused import, scope of variables, need bracers, parameters should be final, only one return, method is not designed for extension, read of unwritten field.