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Category: Java Fundamentals

Learn Java from the ground up - from what Java is and how to install it, through variables, control flow, strings, methods and object-oriented programming, to exceptions, generics and collections. Each tutorial builds on the previous one, with runnable examples.
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How to Install the JDK and Set JAVA_HOME and PATH
Posted: October 23, 2026
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Choosing a Java IDE: IntelliJ IDEA vs Eclipse vs VS Code
Posted: October 23, 2026
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Java Hello World Program Explained Line by Line
Posted: October 23, 2026
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Compiling and Running Java Programs with javac and java
Posted: October 23, 2026
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How Java Code Runs: Bytecode, Class Loader and JIT
Posted: October 23, 2026
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JShell Tutorial: Java's Interactive REPL with Examples
Posted: October 23, 2026
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Java Syntax Basics: Statements, Identifiers, Keywords
Posted: October 23, 2026
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Variables in Java: Declaration, Initialization and Scope
Posted: October 23, 2026
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Java Primitive Data Types and Their Ranges with Examples
Posted: October 23, 2026
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Java Literals: Integer, Floating-Point, char and boolean
Posted: October 23, 2026
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Type Conversion and Casting in Java with Examples
Posted: October 23, 2026
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Java var Keyword: Local Variable Type Inference
Posted: October 23, 2026
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Java Arithmetic, Relational and Logical Operators
Posted: October 23, 2026
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Java Bitwise and Shift Operators with Examples
Posted: October 23, 2026
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Java Assignment, Increment/Decrement and Ternary Operators
Posted: October 23, 2026
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Java Operator Precedence and Associativity Explained
Posted: October 23, 2026
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Java Console Output: println, printf and String.format
Posted: October 23, 2026
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Reading User Input in Java with Scanner
Posted: October 23, 2026
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Java if, else if and else Statements with Examples
Posted: October 23, 2026
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Java switch Statement Tutorial with Examples
Posted: October 23, 2026
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Java Switch Expressions: Arrow Labels and yield
Posted: October 23, 2026
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Java for Loop Tutorial with Examples
Posted: October 23, 2026
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Java while and do-while Loops with Examples
Posted: October 23, 2026
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Java Enhanced for Loop (for-each) with Examples
Posted: October 23, 2026
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Java break, continue and Labeled Loops Explained
Posted: October 23, 2026
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Java Arrays Tutorial: Declare, Create and Initialize
Posted: October 23, 2026
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Multi-Dimensional and Jagged Arrays in Java
Posted: October 23, 2026
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Java Arrays Class: sort, binarySearch, fill, copyOf
Posted: October 23, 2026
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Common Java Array Programs with Examples
Posted: October 23, 2026
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Java String Basics and Why Strings Are Immutable
Posted: October 23, 2026
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Java String Pool: String Literals vs new String()
Posted: October 23, 2026
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Java String Comparison: == vs equals() vs compareTo()
Posted: October 23, 2026
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Essential Java String Methods with Examples
Posted: October 23, 2026
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String vs StringBuilder vs StringBuffer in Java
Posted: October 23, 2026
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Java Text Blocks: Multi-line Strings with Examples
Posted: October 23, 2026
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Common Java String Programs with Examples
Posted: October 23, 2026
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Java Methods: Defining, Calling and Returning Values
Posted: October 23, 2026
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Is Java Pass-by-Value or Pass-by-Reference?
Posted: October 23, 2026
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Method Overloading in Java with Examples
Posted: October 23, 2026
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Java Varargs: Variable-Length Arguments with Examples
Posted: October 23, 2026
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Recursion in Java with Examples
Posted: October 23, 2026
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Static vs Instance Methods in Java
Posted: October 23, 2026