Tutorial · 42 lessons

Java Tutorial

Learn Java from scratch with a free chapter-by-chapter course: OOP, collections, streams, exceptions and threads, with diagrams and verified code output.

Start with lesson 1 View curriculum

Free
16 chapters
4h 1m of reading

Main.java

public class Main {
  public static void main(String[] a) {
    System.out.println("Hello, Java!");
  }
}
// Run it, change it, learn it.

Lesson complete

62% of track

Chapters: 16
Lessons: 42
Reading time: 4h 1m
Level: All levels

Curriculum

What's inside this course

Read the chapters in order, or open any lesson. Completed lessons are ticked.

01 Getting Started3 lessons · 14m
02 Variables and Data Types4 lessons · 22m
03 Operators2 lessons · 12m
1. Arithmetic, Assignment and Increment Operators 6 min
2. Relational, Logical, Bitwise and Ternary Operators 6 min
04 Control Flow3 lessons · 18m
05 Arrays2 lessons · 12m
1. Arrays in Java 6 min
2. 2D Arrays and Matrix Programs 6 min
06 Strings2 lessons · 13m
1. Strings and the String Pool 7 min
2. StringBuilder and String Programs 6 min
07 Methods3 lessons · 16m
08 Classes and Objects3 lessons · 18m
09 Inheritance and Polymorphism3 lessons · 16m
10 Abstraction and Modern Types3 lessons · 15m
11 Exception Handling2 lessons · 12m
1. try, catch, finally and the Exception Hierarchy 6 min
2. Checked Exceptions, Custom Exceptions and try-with-resources 6 min
12 Collections Framework3 lessons · 18m
13 Generics, Lambdas and Streams3 lessons · 18m
14 Files and Date-Time2 lessons · 12m
1. File Handling with java.nio.file 6 min
2. Dates and Times with java.time 6 min
15 Multithreading and Concurrency2 lessons · 13m
1. Threads, Race Conditions and synchronized 6 min
2. ExecutorService, CompletableFuture and Virtual Threads 7 min
16 Project and Next Steps2 lessons · 12m
1. Project: Library Management System 6 min
2. Next Steps: Maven, JUnit and Spring Boot 6 min

Java Tutorial

What's inside this course

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