held on weekends (Saturday-Sunday) to accommodate students and working professionals. : Programs typically span 10 to 12 weeks
| | GeeksforGeeks | LeetCode | Coursera | | :--- | :--- | :--- | :--- | | Content Type | Tutorials, articles, courses, coding problems, interview prep | Primarily coding problems and mock interviews | University-style courses, specializations, and degrees from universities and companies | | Learning Path | Offers structured courses and learning paths for specific roles like Java backend developer | Focuses on problem-solving skills; users create their own paths | Provides well-defined specializations and degrees with structured curricula | | Difficulty Level | Content ranges from beginner to advanced, with a strong focus on fundamentals and in-depth explanations | Problems range from easy to very hard, with a focus on algorithmic challenges | Varies widely, from introductory to graduate-level courses | | Target Audience | Beginners to intermediate learners, job seekers, and those wanting comprehensive conceptual knowledge | Intermediate to advanced users, particularly those preparing for FAANG interviews | Wide range, from beginners to professionals seeking formal education or career advancement | | Hands-On Learning | Coding problems and integrated projects within courses | Extensive coding problem library with test cases and real-time feedback | Peer-graded assignments, quizzes, and hands-on projects in some courses | | Community & Support | Large community, 24/7 doubt support in paid courses, active forum discussions | Large community with active discussion forums for each problem | Community forums for discussions, but less immediate doubt resolution |
@GetMapping("/id") public ResponseEntity<UserDto> getUser(@PathVariable Long id) return ResponseEntity.ok(userService.findById(id));
Solve Java-specific coding challenges on the GFG Practice page to improve your algorithmic thinking. GeeksForGeeks - JAVA Backend Development
For integrating third-party login providers (like Google or GitHub).
jdbcTemplate.query("SELECT * FROM users", new BeanPropertyRowMapper<>(User.class));
Looking for more? Check out GeeksforGeeks’ complete with hands-on projects, mentor support, and certification. jdbcTemplate
Learn to auto-configure standalone, production-grade Spring applications.
| Phase | Project | Tech Stack | GFG Resource Used | | :--- | :--- | :--- | :--- | | | To-Do List API | Core Java, Servlets, JDBC | GFG "Servlets tutorial" | | Intermediate | E-commerce Cart API | Spring Boot, Hibernate, MySQL | GFG "Spring Boot with JPA" | | Advanced | Payment Gateway Simulator | Spring Boot, Kafka, Redis, JWT | GFG "Microservices with Kafka" | | Expert | URL Shortener (Scalable) | Java, Redis, Base62 encoding, Docker | GFG "System Design: TinyURL" |
Backend systems rely heavily on data persistence. GFG bridges the gap between Java and databases through: | Phase | Project | Tech Stack |
Finally, build and deploy three portfolio projects: a Library Management System (Core Java/JDBC), an E-Commerce REST API (Spring Boot/JPA), and a Real-time Chat Application (WebSockets/Spring Security). To tailor your Java learning path, tell me:
Knowing when to use Relational Databases (MySQL, PostgreSQL) vs. NoSQL Databases (MongoDB, Redis for caching).
If you prefer a structured path over scattered articles, GFG offers dedicated curated courses that guide you from syntax to deployment.
@ExtendWith(MockitoExtension.class) class UserServiceTest @Mock private UserRepository repo; @InjectMocks private UserService service; @Test void testGetUserById() when(repo.findById(1L)).thenReturn(Optional.of(new User())); assertNotNull(service.getUser(1L));
and dedicated teaching assistants to help when code breaks at 2 AM. Students have reported that the live weekend classes