Conclusion: What You Learned

1. Object-oriented design  
   The design methodology  
   CRC cards and UML diagrams  
   Design patterns
   
2. Advanced Java  
   Interface types, polymorphism, and inheritance  
   Inner classes  
   Reflection  
   Multithreading  
   Collections
   
3. User interface programming  
   Building Swing applications  
   Event handling  
   Graphics programming