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Tutorials under '@NotNull'

Practical, example-driven posts focused on Java, Spring Boot, backend design, and performance.

Building Annotation-Based Validation Frameworks in Java Using Annotations and Reflection

Learn how to build custom annotation-based validation frameworks in Java using reflection. Explore javax.validation-like design, pitfalls, and best practices

Annotation Based Validation Custom Annotations Validation Frameworks Reflection In Java @NotNull @Size @Pattern Runtime Annotations Javax.validation