Here is a list of some common Java topics that are often covered in interviews and exams:
- Java Basics: syntax, data types, variables, operators, control structures, loops, arrays, and collections.
- Object-Oriented Programming (OOP): classes, objects, inheritance, polymorphism, and interfaces.
- Exception Handling: try-catch, throw, and throws keywords, checked and unchecked exceptions, custom exceptions.
- Concurrency: threads, synchronization, locks, volatile, and the java.util.concurrent package.
- Generics: type parameters, type bounds, wildcards, and generic methods and classes.
- Lambda Expressions and Streams: functional interfaces, anonymous classes, method references, and functional operations on streams.
- JavaFX: event-driven programming, graphical user interfaces (GUIs), and media APIs.
- Java Database Connectivity (JDBC): connecting to databases, executing SQL statements, and processing results.
- Java Persistence API (JPA): entities, relationships, annotations, entity managers, transactions, and query language (JPQL).
- Java Enterprise Edition (JavaEE): servlets, JavaServer Pages (JSPs), JavaServer Faces (JSFs), and Java Message Service (JMS).
- Java Networking: sockets, protocols, and the java.net package.
- Java Security: cryptography, access control, and the java.security package.
- Reflection: accessing and manipulating classes and objects at runtime.
- JavaFX: event-driven programming, graphical user interfaces (GUIs), and media APIs.
- Java Advanced topics: JCache, Java Logging, Java NIO, and the ScheduledExecutorService.
These topics cover a broad range of Java-related knowledge, and are likely to be covered in interviews or exams that test Java skills. It’s important to have a good understanding of these topics and to be able to apply the concepts to solve practical problems.
