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Java 2025 Curriculum: Where to Start for Beginners

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Java 2025 Learning Plan: Where to Start for Beginners



Java remains one of the most in-demand programming languages in the world. Banking systems, Android applications, enterprise solutions — Java is used everywhere. If you've decided to start learning in 2025, it's important to have a clear learning plan. In this article, we'll break down a step-by-step roadmap for beginners, from installing tools to first projects.



Step 1. Setting Up the Environment

Before writing code, set up your workspace. You will need:

  • JDK (Java Development Kit) — version 17 or 21 LTS. Download from the official Oracle website or OpenJDK.
  • Integrated Development Environment (IDE) — IntelliJ IDEA Community Edition (free) or Eclipse.
  • Build System — Maven or Gradle (will be needed later, at the project stage).

After installation, verify it works: write a simple Hello World program and run it.



Step 2. Java Core Basics

This is the foundation you need to master first. Without it, it's impossible to move forward.

  • Variables, data types (int, double, boolean, String).
  • Conditional statements (if, switch).
  • Loops (for, while, do-while).
  • Arrays and working with them.
  • Methods: creation, parameters, return values.
  • OOP: classes, objects, inheritance, polymorphism, encapsulation.
  • Exceptions (try-catch-finally).

Recommended resource: the book "Java: The Complete Reference" by Herbert Schildt (latest edition) or a free course on Stepik.



Step 3. Advanced Java Topics

Once the basics are mastered, move on to more complex concepts:

  • Collections (List, Set, Map) and their implementations (ArrayList, HashMap, TreeSet).
  • Stream API and lambda expressions (Java 8+).
  • Multithreading (Thread, Runnable, ExecutorService).
  • File handling (Java I/O, NIO).
  • Databases: JDBC, SQL basics.

At this stage, it's useful to solve problems on Codewars or LeetCode.



Step 4. Tools and Technologies

A modern Java developer cannot do without additional tools:

  • Version control systems: Git + GitHub/GitLab.
  • Project builders: Maven or Gradle.
  • Testing: JUnit 5.
  • Logging: Log4j or SLF4J.
  • Databases: PostgreSQL or MySQL via JDBC or Hibernate.


Step 5. Frameworks and First Project

After the basics, start learning frameworks. The most popular stack in 2025:

  • Spring Boot — for creating web applications and REST APIs.
  • Hibernate — for working with databases (ORM).
  • Spring Data JPA — simplifies working with databases.

Create your first project: a TODO application or a simple online store. Upload the code to GitHub — this will be the first item in your portfolio.



Tips for Beginners