Java Core in Practice with 120+ Exercises and Quizzes - 2025

Java Core in Practice with 120+ Exercises and Quizzes - 2025

Java Core, Object Oriented Programming (OOP), Collections, Maps, Exceptions, Generics, IO, and Concurrency Explained

What you'll learn

• Java
• Java Core
• Java Development Kit (JDK) setup
• Basic Java program execution
• Integrated Development Environment (IDE) understanding
• Primitive data types usage
• Variable declaration and initialization
• Type casting
• Primitive and non-primitive data type differentiation
• Array and string declaration
• Variable naming conventions
• Variable scope
• Console output
• Console input using the Scanner class
• Arithmetic operators usage
• Comparison and logical operators usage
• Operator precedence understanding
• if-else statement usage
• Switch statement usage
• Loop usage (for, while, do-while)
• Loop control (break, continue)
• Method definition and invocation
• Method overloading
• Recursion in methods
• Array manipulation
• String immutability understanding
• String concatenation
• String comparison
• String formatting
• String pool concept
• Object Oriented Programming (Java OOP)
• Class and object creation
• Constructor usage
• Encapsulation with getters and setters
• Inheritance implementation
• Method overriding
• Use of the super keyword
• Polymorphism in Java
• Method overloading and overriding differentiation
• Abstract classes and interfaces usage
• SOLID principles application
• Exception handling with try-catch blocks
• Checked and unchecked exceptions differentiation
• Custom exception creation
• Collections and Maps
• List, Set, and Queue usage
• Map manipulation
• Iterator usage
• Enumerations
• Generic class and method creation
• Input/output stream usage
• Object serialization and deserialization
• Thread management
• Synchronization for thread safety
• Executor framework usage
• Fork/Join framework usage
• Thread pooling
• Atomic variables for thread safety
• Inter-thread communication with wait-notify

Welcome to the World of Java Programming!

Welcome to our Java Core Course! We are happy to have you here as you begin your journey into programming or grow your skills. 

This course is perfect for everyone—whether you’re just starting, thinking about switching careers, or simply curious about coding. You don’t need a computer science degree to join—just a desire to learn.

At ITER Academy, we have already taught over 1,000 students in classrooms. Now, we are bringing all that knowledge and experience online, so more people can benefit. Your teacher, Andrii Partola, is a Senior Java Engineer who works with Java every day. 

He uses Java to create powerful and complex programs for real companies. He has taken his real-world experience and turned it into lessons that are easy to understand and fun to follow.

Learn with Real-Life Examples

Learning is easier when you can see how things work. That’s why this course is full of real-life examples. 

You’ll see how Java is used to solve problems, so you can understand not just what you’re learning, but also why it’s useful. 

These examples will help you remember things better and prepare you to use Java on your own.

Quizzes to Check Your Knowledge

To make sure you really understand the material, this course includes quizzes after many lessons. These quizzes will help you review important ideas and see how much you’ve learned. They’re a fun way to test yourself and feel confident before moving on to the next topic.

Practice Coding with Exercises

The best way to learn programming is by writing code yourself. That’s why this course has lots of coding exercises. 

These exercises give you a chance to practice what you’ve learned and solve problems like a real programmer. By doing this, you’ll get better and more confident with every lesson.

Lessons Designed for Success

We didn’t just create this course from scratch. We studied many other popular courses to learn what works best. 

Every lesson in this course is carefully organized, so it’s easy to follow and makes sense step by step. Each lesson is packed with useful information, so you learn quickly without wasting time.

Free Access to All Code

All the code written in this course is available on GitHub. You can download it, use it, and practice with it whenever you need. This means you’ll always have access to examples to help you as you keep learning.