Java Course Day 16
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This document discusses Java annotations and design patterns including proxy, decorator, and reflection. It explains that annotations in Java can be used to override methods, suppress warnings, and deprecate methods. Proxy design patterns can shield the fact that an implementation resides remotely and optimize performance. The decorator pattern allows transparently adding responsibilities to objects without affecting other objects or allowing those responsibilities to change in the future.
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Java Course Day 16
- 1. Day 16
- 2. Annotations
- 3. @Override
- 6. How to create Annotation?
- 7. @Target
- 10. @Target @Retention @Inherited @Documented
- 11. Reflection
- 12. Proxy
- 14. “The remote proxy can shield the fact that the implementation resides in another address space.”
- 15. “The remote proxy can shield the fact that the implementation resides in another address space.” “The virtual proxy can perform optimizations— for example, by creating objects on demand.”
- 16. Decorator
- 18. “You want to transparently and dynamically add responsibilities to objects without affecting other objects.”
- 19. “You want to transparently and dynamically add responsibilities to objects without affecting other objects.” “You want to add responsibilities to an object that you may want to change in the future.”
- 20. “You want to transparently and dynamically add responsibilities to objects without affecting other objects.” “You want to add responsibilities to an object that you may want to change in the future.” “Extending functionality by subclassing is no longer practical.”