Additional Notes
What does RetentionPolicy.RUNTIME mean for annotation availability?
Track: Java
Topic: Java Annotations
Focus: Retention Policies
Java: Retention Policies
Answer
Annotations are available at runtime. Frame the concept in practical terms so you can explain it during interview discussion.
RetentionPolicy.RUNTIME ensures that annotations are preserved in the bytecode and can be accessed during the program's execution. This is crucial for frameworks like Spring Boot, where annotations are used to define behaviors such as mapping HTTP requests. For instance, a custom @Route annotation can be used with RUNTIME retention to dynamically map URLs to specific methods.
RetentionPolicy.RUNTIME ensures that annotations are preserved in the bytecode and can be accessed during the program's execution. This is crucial for frameworks like Spring Boot, where annotations are used to define behaviors such as mapping HTTP requests. For instance, a custom @Route annotation can be used with RUNTIME retention to dynamically map URLs to specific methods.
Topics: Java Java Annotations Retention Policies