Code Smells

Bloaters

OO Abusers

Change Preventers

Dispensables

Couplers

Bloaters

• Long Method
• Large Class
• Primitive Obsession
  • ​Using multiple primitives to represent concepts instead of an object.
• Long Parameter List
• Data Clumps
  • ​Data that always appears together and in the same locations 

OO Abusers

• Switch Statements
• Temporary Field
• Refused Bequest
• Alternative Classes with Different Interfaces

Change Preventers

• Divergent Change
• Shotgun Surgery 
• Parallel Inheritance Hierarchies

The Dispensables

• Lazy class
• Data class 
• Duplicate Code
• Dead Code
• Speculative Generality

The Couplers

• Feature Envy
• Inappropriate Intimacy
• Message Chains 
• Middle Man