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Java notes for developers

Master Java with a curated set of 3 developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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Java

Interview Questions

Java & Spring Boot Interview Questions Q: What is the difference between == and equals() in Java? == compares object references (memory address) for objects, or…

Java

Core Java

Core Java OOP Fundamentals // Encapsulation — private fields, public getters/setters public class User { private String name; private String email; private int …

Java

Spring Boot

Spring Boot Controllers & Services // REST Controller @RestController @RequestMapping("/api/users") @RequiredArgsConstructor public class UserController { priva…

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