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SrcForge Java Tutorial Hub

Learn Java through focused lessons, one topic at a time.

Start with the basics and move through syntax, data types, object-oriented programming, statements, and practice questions in a clean tutorial flow.

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61 trackable lessons

Lessons

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Foundation

Getting Started with Java

What Java is, why it's popular, and how to write, compile and run your first program.

Lesson 1

What is Java?

Learn what Java is, its origin, WORA, major applications and how to install and run your first Java program on Windows.

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Lesson 2

Features of Java

Learn why Java is popular, what its core features mean and how those features power reliable, scalable applications.

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Syntax Basics

The building blocks of Java source code: keywords, identifiers, tokens and data types.

Lesson 3

Keywords

Learn Java keywords, their meaning and why reserved words cannot be used as identifiers or variable names.

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Lesson 4

Tokens

Learn Java tokens, keywords, identifiers, literals, operators, separators, comments and constants used in source code.

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Lesson 5

Datatypes

Learn Java primitive and non-primitive data types, their sizes, ranges and common value examples for beginners.

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Lesson 6

Type Casting

Beginner-friendly guide to Java type casting: implicit vs explicit, examples and FAQs.

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Lesson 7

Wrapper Class

Learn Java Wrapper Class with examples. Understand boxing, unboxing, primitive types and wrapper objects in simple beginner-friendly language.

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Operators, Statements & Control Flow

Performing operations on data and controlling which code runs and when.

Lesson 8

Operators

Learn Java Operators with examples. Understand arithmetic, relational, logical, assignment, conditional and bitwise operators in Java.

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Lesson 9

Java Statements

Learn what Java statements are, the main statement types and how command-line arguments work in a first Java program.

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Lesson 10

Control Statements

Learn Control Statements in Java with examples. Understand if, if-else, else-if, nested if and switch statements in simple beginner-friendly language.

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Lesson 11

Loops

Learn Loops in Java with examples. Understand for loop, while loop, do-while loop, enhanced for loop, break and continue statements easily.

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User Input & Methods

Reading input with Scanner and organizing code into reusable methods.

Lesson 12

Expressions and Scanner Class

Learn Expressions and Scanner Class in Java with examples. Understand arithmetic, relational, logical expressions and how to take user input during program execution.

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Lesson 13

Methods

Learn Methods in Java with examples. Understand method types, parameters, return types, recursion, scope and static methods in simple language.

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Lesson 14

Constructors

Learn Constructors in Java with examples. Understand default, parameterized and copy constructors in simple beginner-friendly language.

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Lesson 15

Modifiers

Learn Modifiers in Java with examples. Understand access modifiers, non-access modifiers, public, private, protected, final, static, abstract and more.

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Arrays & Strings

Storing collections of data and working with text.

Lesson 16

Arrays

Learn Arrays in Java with examples. Understand one-dimensional arrays, multidimensional arrays, jagged arrays, sorting, searching and array operations.

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Lesson 17

Strings and StringBuffer

Learn Java Strings, StringBuffer and StringBuilder with examples. Understand string methods, mutability, thread safety and performance differences.

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Lesson 18

Regex (Regular Expressions)

Learn Java Regex (Regular Expressions) with examples. Understand Pattern, Matcher, character classes, quantifiers, metacharacters and string validation techniques.

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Packages & Code Organization

Structuring Java code into namespaces.

Lesson 19

Packages

Learn Packages in Java with examples. Understand built-in packages, user-defined packages, import statements, package creation, benefits and best practices.

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Intermediate

Object-Oriented Programming

The four pillars of OOP plus the Java mechanics that implement them.

Lesson 20

OOP Concepts

Learn OOP concepts in Java including Class, Object, Encapsulation, Abstraction, Polymorphism, Inheritance, Dynamic Binding and Message Passing with examples.

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Lesson 21

Inheritance

Learn Inheritance in Java with examples of Single, Multilevel and Hierarchical Inheritance. Understand the extends keyword, superclass, subclass and code reusability.

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Lesson 22

Abstraction

Learn Abstraction in Java with examples. Understand abstract classes, abstract methods, implementation hiding, OOP concepts, benefits and real-world use cases.

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Lesson 23

Encapsulation

Learn Encapsulation in Java with examples. Understand data hiding, private variables, getter and setter methods, benefits and OOP principles for beginners.

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Lesson 24

Polymorphism

Learn Polymorphism in Java with examples of method overloading, constructor overloading, method overriding, dynamic dispatch, upcasting and downcasting.

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Lesson 25

Interface

Learn Interfaces in Java with examples. Understand abstraction, multiple inheritance, interface constants, implements keyword and interface vs abstract class.

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Classes In Depth

Inner classes, anonymous classes, the final keyword, singletons and the root Object class.

Lesson 26

Inner Classes, Static Members and Static Blocks

Learn Inner Classes, Static Variables, Static Methods and Static Blocks in Java with examples, syntax, outputs and FAQs for beginners.

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Lesson 27

Anonymous Inner Class

Learn Java Anonymous Inner Class with syntax, examples, advantages, limitations and FAQs. Understand how anonymous classes simplify Java programming.

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Lesson 28

Final Keyword

Learn the Java Final Keyword with examples of final variables, final methods and final classes. Understand syntax, rules, benefits and FAQs.

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Lesson 29

Singleton Class

Learn Java Singleton Class with syntax, examples, advantages, implementation steps and FAQs. Understand the Singleton Design Pattern in Java.

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Lesson 30

Object Class

Learn the Java Object Class with examples, methods and use cases. Understand equals(), hashCode(), toString(), getClass() and more.

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Modern Java Features

Recursion, enums, generics, lambda expressions and the Stream API.

Lesson 31

Recursion

Learn Java recursion with simple examples. Understand recursive methods, base cases, factorial programs, advantages and best practices.

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Lesson 32

Enumeration (Enum)

Learn Java Enumeration (Enum) with examples. Understand enum syntax, switch statements, values() method, advantages and best practices.

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Lesson 33

Generics

Learn Java Generics with examples. Understand generic methods, type parameters, compile-time safety, advantages and best practices.

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Lesson 34

Lambda Expressions

Learn Java Lambda Expressions with examples. Understand syntax, functional interfaces, advantages, use cases and best practices in Java 8+.

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Lesson 35

Java Stream API

Learn Java Stream API with examples. Understand streams, filter, map, reduce, sorting, terminal operations and best practices in Java 8+.

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Collections Framework

Storing and managing groups of objects: lists, sets, maps and their sorted variants.

Lesson 36

Java Collections Framework

Learn Java Collections Framework with examples. Understand List, Set, Queue, Map, ArrayList, HashSet, HashMap and best practices.

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Lesson 37

ArrayList and LinkedList

Learn Java ArrayList and LinkedList with examples. Compare features, performance, advantages, use cases and best practices in Java Collections.

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Lesson 38

HashMap and HashSet

Learn Java HashMap and HashSet with examples. Understand key-value pairs, unique elements, differences, methods and best practices.

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Lesson 39

TreeMap and TreeSet

Learn Java TreeMap and TreeSet with examples. Understand sorted collections, methods, differences, advantages and best practices in Java.

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Exception Handling

Handling runtime errors gracefully — required reading before I/O and concurrency.

Lesson 53

Exception Handling

Learn Java Exception Handling with examples. Understand try, catch, finally, ArithmeticException, IOException, NumberFormatException, and best practices.

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Advanced

Java I/O & Data Handling

Working with dates, files, streams and saving objects to disk.

Lesson 54

Date and Time API

Learn Java Date and Time API with examples. Understand LocalDate, LocalTime, LocalDateTime, DateTimeFormatter, date formatting, and best practices.

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Lesson 55

InputStream and OutputStream

Learn Java InputStream and OutputStream with examples. Understand FileInputStream, FileOutputStream, stream methods, file handling, and Java I/O best practices.

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Lesson 56

Java File I/O (NIO)

Learn Java File I/O (NIO) with examples. Understand Path, Files, file handling, directory operations, NIO methods, and best practices for modern Java development.

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Lesson 57

Serialization and Deserialization

Learn Java Serialization and Deserialization with examples. Understand Serializable, ObjectInputStream, ObjectOutputStream, transient fields, and object persistence.

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Lesson 58

Transient Keyword

Learn the Java transient keyword with examples. Understand how transient works in serialization, why it is used, and what happens after deserialization.

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Multithreading & Concurrency

A deep, dedicated module on Java threads — life cycle, scheduling, pools, synchronization and deadlocks. Recommended after you're comfortable with everything above.

Lesson 40

Multithreading

Learn Java Multithreading with examples. Understand threads, Runnable, synchronization, thread lifecycle, advantages and best practices.

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Lesson 41

Thread Life Cycle

Learn the Java Thread Life Cycle with examples. Understand New, Runnable, Waiting and Terminated states, thread transitions, synchronization and best practices.

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Lesson 42

Thread Priority

Learn Java Thread Priority with examples. Understand MIN_PRIORITY, NORM_PRIORITY, MAX_PRIORITY, scheduling, yield() and best practices.

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Lesson 43

Thread Scheduler

Learn Java Thread Scheduler with examples. Understand thread scheduling, priorities, context switching, JVM scheduling and multithreading concepts.

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Lesson 44

Thread sleep() Method

Learn the Java Thread sleep() method with examples. Understand syntax, thread states, InterruptedException, uses and best practices in multithreading.

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Lesson 45

Thread join() Method

Learn the Java Thread join() method with examples. Understand thread coordination, waiting state, InterruptedException, syntax and best practices.

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Lesson 46

Daemon Thread

Learn Java Daemon Threads with examples. Understand daemon vs user threads, JVM behavior, setDaemon(), uses, advantages and best practices.

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Lesson 47

Thread Pool

Learn Java Thread Pool with ExecutorService examples. Understand thread reuse, Executors, task execution, benefits and multithreading best practices.

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Lesson 48

ThreadGroup

Learn Java ThreadGroup with examples. Understand thread grouping, thread management, activeCount(), enumerate(), methods and best practices.

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Lesson 49

Shutdown Hook

Learn Java Shutdown Hooks with examples. Understand addShutdownHook(), JVM shutdown process, cleanup tasks, resource management and best practices.

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Lesson 50

Runtime Class

Learn the Java Runtime class with examples. Understand getRuntime(), memory management, exec(), garbage collection, shutdown hooks and JVM interaction.

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Lesson 51

Synchronization

Learn Java Synchronization with examples. Understand synchronized methods, synchronized blocks, thread safety, race conditions, monitor locks, and best practices.

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Lesson 52

Deadlock and Inter-Thread Communication

Learn Java Deadlock and Inter-Thread Communication with examples. Understand wait(), notify(), notifyAll(), thread coordination, deadlock prevention, and best practices.

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JVM Internals & Capstone

How Java manages memory under the hood, and building apps for a global audience.

Lesson 59

Stack Memory vs Heap Memory

Learn Java Stack Memory vs Heap Memory with examples. Understand differences, uses, JVM memory management, StackOverflowError, and OutOfMemoryError.

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Lesson 60

Garbage Collection

Learn Java Garbage Collection with examples. Understand unreferenced objects, System.gc(), finalize(), heap memory cleanup, and JVM garbage collection basics.

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Lesson 61

Internationalization and Localization (I18N and L10N)

Learn Java Internationalization and Localization (I18N/L10N) with Locale, ResourceBundle, DateFormat, and NumberFormat examples for dates, time, numbers, and currency.

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