P4
1. Unnecessarily qualified static access
2. Class SigList explicitly extends a Collection class (replace with delegate)
3. Call to 'StringBuffer.toString()' in concatenation
4. Renaming Handler::stringToArrayList to stringToList
5. Single character string argument in 'String.indexOf()' call
6. Set replaceable with EnumSet
7. Map replaceable with EnumMap
2. Class SigList explicitly extends a Collection class (replace with delegate)
3. Call to 'StringBuffer.toString()' in concatenation
4. Renaming Handler::stringToArrayList to stringToList
5. Single character string argument in 'String.indexOf()' call
6. Set replaceable with EnumSet
7. Map replaceable with EnumMap