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Core Java Tutorial

Learn Core Java From Scratch

Learn Core Java with syntax, OOP, arrays, strings, collections, exception handling, generics, multithreading, Java 8 features, common errors, and interview practice.

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About Core Java

Learn Core Java with syntax, OOP, arrays, strings, collections, exception handling, generics, multithreading, Java 8 features, common errors, and interview practice.

Prerequisites

Basic computer knowledge is enough to start. Prior programming experience is helpful but not required.

Audience

Designed for beginners, students, interview preparation, and developers who want a clear Core Java path.

What You'll Learn

Core concepts, examples, common mistakes, practical patterns, FAQs, and a step-by-step learning roadmap.

Tools Needed

Use a modern browser, code editor, terminal, and the available online compiler when supported.

Tutorial Topics

Follow the lessons in order, or jump straight into the topic you need.

1. Introduction
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2. Getting Started
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3. Data Types
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4. Variables
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5. Operators
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6. Control Flow
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7. Loops
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8. Arrays
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9. Strings
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10. Methods
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11. Classes & Objects
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12. OOP Basics
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13. Inheritance
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14. Polymorphism
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15. Abstraction
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16. Encapsulation
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17. Packages
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18. Exception Handling
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19. Collections
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20. Generics
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21. Multithreading
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22. Java 8 Features
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23. Java Error Hub
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24. NullPointerException
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25. ClassNotFoundException
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26. ArrayIndexOutOfBoundsException
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27. NumberFormatException
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28. ConcurrentModificationException
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29. StackOverflowError
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30. OutOfMemoryError
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31. IllegalArgumentException
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32. NoSuchMethodError
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33. ClassCastException
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Core Java Topic Hub

Use the full topic workspace when you want tutorials, practice, interview prep, and nearby topic links in one place.

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Tutorials, practice, and prep together
Topic hub 4 surfaces OOP Collections
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Why Learn Core Java?

  • Build a strong foundation with clear explanations and examples.
  • Practice concepts in a structured order instead of jumping randomly.
  • Prepare for interviews with common mistakes, FAQs, and practical notes.
  • Learn patterns that transfer to real projects and production work.
  • Use one complete learning path from basics to advanced topics.

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