Java Tutorials

Java provides a systematic learning path for object - oriented programming. Our tutorials cover Java fundamentals, advanced concepts, and popular frameworks, suitable for both beginners and experienced developers. With free labs and real - world code examples, you'll gain practical experience in Java development. Our Java playground allows you to experiment with different Java features and see immediate results.

Recursion and Loops

Recursion and Loops

Computers are often used to automate repetitive tasks. Repeating tasks without making errors is something that computers do well and people do poorly. Like conditional expressions, loops can also be nested one in another, but this will make our program hard to read and the performance will not be good. Try to avoid nested loops. There are three types of loops in Java. We'll learn them one by one in this lab.

Number, String and Array

Number, String and Array

In Java and other object-oriented languages, objects are collections of related data that come with a set of methods. These methods operate on the objects, performing computations and sometimes modifying the object’s data. Here we introduce three simple but important Java built-in object types: Number, String and Array.

Abstraction and Interface

Abstraction and Interface

Abstraction and interface are two other significant concepts in Java. Abstract class and interface are very different although there are some common points. Start this lab and comprehend the concepts.

Class and Object

Class and Object

In this lab, you are going to learn a very important programming pattern: the object-oriented-programming. You need to know the difference between class and object. Take more practice to get a better understanding.

Methods & Parameters and Object

Methods & Parameters and Object

In this lab, we move forward to methods and objects. The task is to learn how to define a method with parameters. Object is a very important concept in OOP language, so having a good knowledge of it will be good for you.

Java Conditional Expressions Fundamentals

Java Conditional Expressions Fundamentals

In this lab, we learned basic data types of Java and operators. In this lab, we'll begin to learn to write procedure-oriented programs. The main idea is to use paradigm of controlling structures: conditional expressions.

Spy in Mockito

Spy in Mockito

Mockito is a Java framework used for mocking and unit testing Java applications. In this lab, we will learn about spies in Mockito. A Spy is like a partial mock, which will track the interactions with the object like a mock. Additionally, it allows us to call all the normal methods of the object. We will use the Mockito.spy() method and annotations to create spies and demonstrate how to stub a Spy.

Variables and Operators in Java

Variables and Operators in Java

Learn Java variables, data types, and operators in this hands-on lab. Learn to declare variables, work with primitive data types, and apply arithmetic, bitwise, and logical operators in Java programming.

Introduction to Java Programming

Introduction to Java Programming

Discover the fundamentals of Java programming in this beginner-friendly lab. Learn about high-level programming languages, Java's advantages, and create your first Java program from scratch to execution.

Java Scanner Input Challenge

Java Scanner Input Challenge

Learn Java user input with Scanner in this beginner-friendly coding challenge. Learn how to create interactive Java programs that read and process user data, essential for building dynamic applications. Practice your skills in a fun, project-based scenario set in the fictional JavaTown.

Java Age Validator Exception Challenge

Java Age Validator Exception Challenge

Dive into Java exception handling with JavaLand Amusement Park's ticket system! As a junior developer, you'll implement an age validator for ride eligibility using custom exceptions. This beginner-friendly challenge will help you master exception creation, throwing exceptions, and input validation while building a practical application for an amusement park ticket system.

Your First Java Lab

Your First Java Lab

Embark on your Java programming journey by exploring fundamental concepts such as setting up your development environment, writing your first program, and understanding basic Java syntax and structure.

Java Inheritance and Polymorphism

Java Inheritance and Polymorphism

Learn the core concepts of object-oriented programming in Java by exploring inheritance and polymorphism. Learn to create base classes, subclasses, override methods, and implement polymorphic behavior in practical coding exercises.

Java Methods and Basic Object-Oriented Programming

Java Methods and Basic Object-Oriented Programming

Learn Java methods and dive into object-oriented programming (OOP) fundamentals. Learn to create and use methods, design classes, instantiate objects, and enhance your Java coding skills through hands-on exercises.

Java Control Flow: Conditionals and Loops

Java Control Flow: Conditionals and Loops

Learn Java control flow with hands-on practice in if-else statements, for loops, while loops, and their combinations. Build practical applications like a weather advisor, multiplication table generator, number guessing game, and prime number finder.

Java Arrays and ArrayLists

Java Arrays and ArrayLists

Learn Java Arrays and ArrayLists in this hands-on lab. Learn to create, manipulate, and convert between these essential data structures for efficient programming.

Java Exception Handling

Java Exception Handling

Learn Java Exception Handling in this comprehensive lab. Learn to manage errors, create custom exceptions, and implement try-catch-finally blocks for robust Java applications.

Java Data Types and Basic Operations

Java Data Types and Basic Operations

Learn Java's fundamental data types and essential operations in this hands-on lab. Learn to work with integers, perform arithmetic operations, handle floating-point numbers, manipulate strings, and apply these concepts in a practical circle calculator project.

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