Class structure

'private' method declared 'final'  

Java

'public' constructor can be replaced with factory method  

Java

'static' method declared 'final'  

Java

'static', non-'final' field  

Java

Abstract 'class' may be 'interface'  

Java

Anonymous inner class can be replaced with inner class  

Java

Class is closed to inheritance  

Java

Class may extend adapter instead of implementing listener  

Java

Class name differs from file name  

Java

Class with only 'private' constructors should be declared 'final'  

Java

Constant declared in 'abstract' class  

Java

Constant declared in interface  

Java

Field can be local  

Java

Inner class of interface  

Java

Interface may be annotated as '@FunctionalInterface'  

Java

Local class  

Java

Marker interface  

Java

Method can't be overridden  

Java

Method returns per-class constant  

Java

Multiple top level classes in single file  

Java

No-op method in 'abstract' class  

Java

Non-'static' initializer  

Java

Non-final field in 'enum'  

Java

Redundant empty class  

Java

Singleton  

Java

Utility class  

Java

Utility class can be 'enum'  

Java

Utility class is not 'final'  

Java

Utility class with 'public' constructor  

Java

Utility class without 'private' constructor  

Java

Value passed as parameter never read  

Java