Java Developer

## 1. Java Developer Overview
A Java Developer is a programmer who designs, develops, and manages Java-based applications. Java is widely used for building web, desktop, and mobile applications, as well as backend systems.

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## 2. Core Skills of a Java Developer
- Java SE (Standard Edition): OOP concepts, Collections, Exception Handling, Multithreading, Streams, Lambdas.
- Java EE (Enterprise Edition): Servlets, JSP, EJB, JPA, JMS.
- Frameworks: Spring, Hibernate, Spring Boot, Struts, JSF.
- Build Tools: Maven, Gradle.
- Version Control: Git, SVN.
- Databases: SQL (MySQL, PostgreSQL), NoSQL (MongoDB).
- Web Technologies: REST, SOAP, HTML, CSS, JavaScript (for full-stack).
- Testing: JUnit, Mockito, Selenium.
- DevOps: Docker, Jenkins, CI/CD basics.

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## 3. Typical Java Developer Tasks
- Writing and maintaining clean, efficient Java code.
- Designing and implementing APIs and backend systems.
- Integrating databases and managing data access layers.
- Debugging and troubleshooting applications.
- Collaborating in Agile/Scrum teams.
- Writing unit and integration tests.

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## 4. Sample Java Code Snippet

```java
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, Java Developer!");
}
}
```

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## 5. Common Interview Questions
- What are the main features of Java?
- Explain the difference between `==` and `.equals()`.
- What is the Java Memory Model?
- Describe the life cycle of a servlet.
- How does Spring Dependency Injection work?

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## 6. Learning Resources
- [Official Java Tutorials](;br /> - [Spring Framework Documentation](;br /> - [Java Design Patterns](;br />
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