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Technology 407 Topics

Java Full Tutorial

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Test Part 1
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Part 1: Introduction to Java: History, Evolution, and Philosophy (WORA)
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Part 1: Introduction to Java: History, Evolution, and Philosophy (WORA)
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Part 2: Java Architecture: JDK, JRE, and JVM Explained
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Part 3: JVM Internals: ClassLoader Subsystem, Memory Areas, and Execution Engine
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Part 4: JIT Compiler, HotSpot Engine, and Ahead-Of-Time (AOT) Compilation
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Part 5: Setting Up Java: OpenJDK, Oracle JDK, and Configuring JAVA_HOME & PATH
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Part 6: Anatomy of a Java Program: Understanding public static void main(String[] args)
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Part 7: Java Source File Structure, Comments, and Coding Conventions
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Part 8: Identifiers, Reserved Keywords, and Literals in Java
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Part 9: Java Primitive Data Types (byte, short, int, long, float, double, char, boolean)
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Part 10: Floating-Point Precision and the IEEE 754 Standard in Java
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Part 11: Variables in Java: Local, Instance, and Static Variables
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Part 12: Variable Scope, Lifetime, and Default Initialization
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Part 13: Type Casting and Conversion: Widening vs Narrowing Casting
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Part 14: Arithmetic and Assignment Operators in Java
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Part 15: Relational and Equality Operators: == vs .equals() Primer
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Part 16: Logical Operators and Short-Circuit Evaluation (&&, ||, !)
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Part 17: Bitwise and Bit Shift Operators (&, |, ^, ~, <<, >>, >>>)
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Part 18: Ternary Operator (?:) and Expression Rules
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Part 19: The instanceof Operator and Type Checking
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Part 20: Control Flow: if, if-else, and Nested Conditional Logic
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Part 21: Control Flow: if-else-if Ladders and Best Practices
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Part 22: The Classic switch Statement: Rules, Fall-through, and break
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Part 23: Modern Switch Expressions and Pattern Matching (Java 14 - 21)
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Part 24: The while Loop: Entry-Controlled Iteration
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Part 25: The do-while Loop: Exit-Controlled Iteration
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Part 26: The Standard for Loop: Initialization, Condition, and Update
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Part 27: The Enhanced for-each Loop: Iterating Over Arrays and Iterables
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Part 28: Jump Statements: break, continue, and Labeled Statements
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Part 29: Introduction to Single-Dimensional Arrays: Declaration, Instantiation, and Access
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Part 30: Array Memory Allocation and Default Values in Java
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Part 31: Multidimensional Arrays: Matrices and Grid Data Structures
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Part 32: Jagged (Ragged) Arrays in Java
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Part 33: The java.util.Arrays Utility Class: Sorting, Searching, and Copying
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Part 34: Command-Line Arguments: Parsing and Best Practices
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Part 35: Console I/O: Scanner, BufferedReader, and Formatted Output (printf)
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Part 36: Principles of Object-Oriented Programming: A High-Level Overview
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Part 37: Classes and Objects: Blueprints vs Concrete Instances
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Part 38: Memory Representation of Objects: Stack vs Heap Allocation
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Part 39: Java Constructors: Role, Rules, and Execution Lifecycle
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Part 40: Default Constructors vs Parameterized Constructors
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Part 41: Constructor Overloading and Initialization Logic
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Part 42: Constructor Chaining and the this() Invocation
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Part 43: The this Keyword: Resolving Shadowed Variables and Instance Passing
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Part 44: Methods in Java: Signatures, Return Types, and Parameters
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Part 45: Parameter Passing Mechanism: Why Java is Strictly Pass-by-Value
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Part 46: Method Overloading: Compile-Time Polymorphism and Promotion Rules
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Part 47: Method Overloading Ambiguities and Pitfalls
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Part 48: Encapsulation: Data Hiding, Getters, Setters, and Invariants
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Part 49: JavaBeans Specification and POJO Conventions
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Part 50: Access Modifiers: public, protected, default, and private
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Part 51: Inheritance Fundamentals: The extends Keyword and IS-A Relationship
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Part 52: Types of Inheritance: Single, Multilevel, and Hierarchical
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Part 53: Why Java Does Not Support Multiple Inheritance with Classes
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Part 54: The super Keyword: Accessing Parent State and Constructors (super())
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Part 55: Constructor Execution Order in Class Hierarchies
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Part 56: Method Overriding: Runtime Polymorphism and Rules
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Part 57: The @Override Annotation and Compile-Time Checks
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Part 58: Covariant Return Types in Method Overriding
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Part 59: Dynamic Method Dispatch: How JVM Resolves Virtual Methods at Runtime
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Part 60: Runtime Polymorphism: Upcasting, Downcasting, and ClassCastException
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Part 61: Abstraction in Java: Concept, Design Benefits, and Implementation
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Part 62: Abstract Classes: Rules, Abstract Methods, and Partial Implementations
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Part 63: Interfaces in Java: Contracts, Complete Abstraction, and the implements Keyword
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Part 64: Abstract Class vs Interface: When to Use Which
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Part 65: Multiple Inheritance with Interfaces and Name Collisions
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Part 66: Interface Evolution: default Methods in Java 8
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Part 67: Static Methods in Interfaces (Java 8)
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Part 68: Private Methods in Interfaces (Java 9)
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Part 69: Functional Interfaces and the @FunctionalInterface Annotation
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Part 70: Marker Interfaces: Serializable, Cloneable, and Remote
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Part 71: The final Keyword: Final Variables and Constants
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Part 72: The final Keyword: Final Methods (Preventing Overriding)
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Part 73: The final Keyword: Final Classes (Preventing Inheritance)
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Part 74: Blank Final Variables and Static Final Constants
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Part 75: The static Keyword: Static Variables and Class-Level State
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Part 76: Static Methods: Class Utilities and Restrictions
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Part 77: Static Initialization Blocks vs Instance Initialization Blocks
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Part 78: The Root java.lang.Object Class and Its Universal Methods
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Part 79: Overriding toString(): Providing Meaningful Text Representation
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Part 80: Overriding equals() and the General Contract
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Part 81: Overriding hashCode() and the Contract with equals()
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Part 82: Object Cloning: Shallow Copy vs Deep Copy and Cloneable
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Part 83: Garbage Collection Finalization: finalize() Deprecation and Cleaner
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Part 84: Java Packages: Namespace Management, Package Statement, and Imports
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Part 85: Static Imports and Best Practices in Package Design
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Part 86: Inner Classes: Overview and Categorization
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Part 87: Member Inner Classes: Syntax, Outer Reference, and Instantiation
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Part 88: Local Inner Classes: Scope and Effectively Final Variables
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Part 89: Anonymous Inner Classes: Creating One-Off Implementations
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Part 90: Static Nested Classes: Independence from Outer Class Instances
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Part 91: Enumerations in Java: The enum Keyword and Type Safety
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Part 92: Enum Properties: Methods, Fields, and Constructors
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Part 93: Enum Methods: values(), valueOf(), ordinal(), and name()
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Part 94: Enums with Constant-Specific Class Bodies and Abstract Methods
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Part 95: Enums Implementing Interfaces and Enum Design Patterns
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Part 96: EnumSet and EnumMap: High-Performance Specialized Collections
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Part 97: Java Records (Java 14-16): Immutable Data Carriers
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Part 98: Anatomy of a Record: Canonical Constructor, Components, and Accessors
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Part 99: Compact Constructors and Custom Validation in Records
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Part 100: Adding Methods, Static Fields, and Interfaces to Records
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Part 101: Sealed Classes and Interfaces (Java 15-17): Restricting Subtyping
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Part 102: Sealed Class Syntax: sealed, permits, final, non-sealed
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Part 103: Pattern Matching for switch with Sealed Classes
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Part 104: Value Objects vs Entities: Domain-Driven Design in Java
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Part 105: Immutability in Java: Rules for Designing Bulletproof Immutable Classes
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Part 106: Defensive Copying: Protecting Class Invariants from External Modification
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Part 107: The Null Object Pattern in Java
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Part 108: Composition vs Inheritance: Favoring Composition in Java Architecture
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Part 109: Coupling and Cohesion in Java Object Design
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Part 110: Law of Demeter and Principle of Least Knowledge
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Part 111: String Fundamentals: Why Strings are Immutable in Java
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Part 112: String Memory Optimization: The String Constant Pool (SCP)
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Part 113: String Creation: String Literals vs new String() Operator
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Part 114: The intern() Method: Forcing Strings into the Constant Pool
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Part 115: Core String Methods: Inspection (length, isEmpty, charAt, contains)
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Part 116: Core String Methods: Transformation (substring, replace, toLowerCase)
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Part 117: Core String Methods: Trimming & Stripping (trim vs strip)
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Part 118: String Splitting and Joining: split(), String.join(), and Delimiters
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Part 119: String Concatenation: + Operator vs concat() vs StringBuilder
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Part 120: StringBuilder Class: Mutable String Manipulation for Single Threads
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Part 121: StringBuffer Class: Thread-Safe Mutable String Manipulation
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Part 122: Performance Benchmarks: String vs StringBuilder vs StringBuffer
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Part 123: String Formatting: String.format(), formatted(), and Specifiers
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Part 124: Text Blocks (Java 13-15): Multiline Strings, Formatting, and Escape Rules
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Part 125: Regular Expressions (Regex) in Java: Syntax and Foundations
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Part 126: The java.util.regex.Pattern and Matcher Classes
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Part 127: Advanced Regex: Groups, Capturing, and Lookahead/Lookbehind
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Part 128: Validating Inputs (Emails, Phone Numbers, UUIDs) with Java Regex
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Part 129: Java Wrapper Classes: Integer, Double, Boolean, and More
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Part 130: Primitive Wrapper Methods: Parsing, Conversion, and Constants
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Part 131: Autoboxing and Unboxing: Mechanics and Performance Overhead
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Part 132: The Integer Cache Mechanism (-128 to 127) and Equality Traps
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Part 133: java.lang.Math Class: Constants, Trigonometry, and Rounding
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Part 134: Generating Random Numbers: Random vs ThreadLocalRandom vs SecureRandom
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Part 135: The java.util.UUID Class: Universally Unique Identifier Generation
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Part 136: Overview of Exception Handling in Java: Philosophy and Benefits
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Part 137: The Exception Hierarchy: Throwable, Error, and Exception
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Part 138: Checked Exceptions: Compile-Time Enforcement and Rationale
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Part 139: Unchecked Exceptions (RuntimeException): Logic Errors and Bugs
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Part 140: Critical Errors: OutOfMemoryError, StackOverflowError, and NoClassDefFoundError
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Part 141: The try-catch Block: Catching and Handling Exceptions Gracefully
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Part 142: Execution Flow of try-catch-finally Under Normal and Exceptional Scenarios
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Part 143: The finally Block: Guarantees, Edge Cases, and Resource Cleanup
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Part 144: Scenarios Where finally Does Not Execute (System.exit, Fatal Crash)
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Part 145: Handling Multiple Exceptions: Order of Catch Blocks and Specificity
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Part 146: Multi-Catch Block (Java 7): Combining Related Exception Handlers
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Part 147: Nested try-catch Blocks and Layered Error Handling
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Part 148: The throw Keyword: Explicitly Raising Exceptions
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Part 149: The throws Keyword: Declaring Exception Signatures in Method Contracts
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Part 150: Creating Custom Checked Exceptions: Best Practices and Constructors
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Part 151: Creating Custom Unchecked Exceptions: Best Practices for Business Logic
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Part 152: Exception Chaining: Wrapping Exceptions and Preserving Root Causes
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Part 153: Try-With-Resources (Java 7): Automatic Resource Management
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Part 154: The java.lang.AutoCloseable and java.io.Closeable Interfaces
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Part 155: Suppressed Exceptions in Try-With-Resources and getSuppressed()
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Part 156: Common Exceptions: Diagnosing and Fixing NullPointerException (NPE)
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Part 157: Common Exceptions: ArrayIndexOutOfBoundsException & StringIndexOutOfBoundsException
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Part 158: Common Exceptions: ClassCastException and Safe Downcasting
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Part 159: Common Exceptions: NumberFormatException and Safe Number Parsing
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Part 160: Common Exceptions: IllegalArgumentException and Parameter Validation
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Part 161: Common Exceptions: IllegalStateException and State Transitions
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Part 162: Common Exceptions: UnsupportedOperationException and Immutable Collections
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Part 163: Anti-Patterns in Exception Handling: Swallowing Exceptions and Catch-Alls
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Part 164: Logging Exceptions: Integrating SLF4J and Logback for Production Diagnostics
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Part 165: Modern Exception Strategies: Functional Error Handling with Result/Either Patterns
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Part 166: Introduction to Generics: Why Java Needed Parametric Polymorphism
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Part 167: Type Safety at Compile Time: Eliminating Explicit Casts
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Part 168: Generic Classes: Definition, Type Parameters (<T>), and Instantiation
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Part 169: Generic Classes with Multiple Type Parameters (<K, V>)
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Part 170: Generic Methods: Declaring Method-Level Type Parameters
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Part 171: Generic Interfaces: Defining Flexible Service Contracts
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Part 172: Generic Constructors: Parameterizing Object Creation
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Part 173: Bounded Type Parameters: Upper Bounds (<T extends Number>)
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Part 174: Multiple Bounds in Generics (<T extends Comparable<T> & Serializable>)
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Part 175: Wildcards in Generics: Unbounded Wildcards (?)
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Part 176: Upper Bounded Wildcards (? extends Number)
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Part 177: Lower Bounded Wildcards (? super Integer)
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Part 178: The PECS Rule: Producer Extends, Consumer Super Explained
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Part 179: Subtyping in Generics: Why List<String> is NOT a List<Object>
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Part 180: Type Erasure: How the JVM Implements Generics at Bytecode Level
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Part 181: Bridge Methods: Preserving Polymorphism Under Type Erasure
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Part 182: Restrictions on Generics: Cannot Instantiate Type Parameters with Primitives
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Part 183: Restrictions on Generics: Cannot Create Instances of Type Parameters (new T())
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Part 184: Restrictions on Generics: Cannot Declare Static Fields of Generic Type
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Part 185: Restrictions on Generics: Cannot Create Generic Arrays (new T[10])
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Part 186: Restrictions on Generics: Cannot Use instanceof with Parameterized Types
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Part 187: Restrictions on Generics: Exception Handling Limitations with Type Parameters
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Part 188: Raw Types in Java: Backward Compatibility and Compiler Warnings
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Part 189: Type Tokens and Super Type Tokens in Java Frameworks
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Part 190: Generic DAO Pattern: Building Reusable Data Access Objects
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Part 191: Java Collections Framework (JCF): Architecture, Benefits, and Core Hierarchy
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Part 192: The java.lang.Iterable Interface: The Root of Collection Traversal
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Part 193: The java.util.Collection Interface: Common Collection Operations
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Part 194: The java.util.List Interface: Positional Access and Ordered Collections
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Part 195: ArrayList Architecture: Internal Dynamic Array Resizing and Growth Factor
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Part 196: ArrayList Performance Analysis: Time Complexities of Get, Add, and Remove
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Part 197: ArrayList Best Practices: Capacity Management and trimToSize()
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Part 198: LinkedList Architecture: Doubly-Linked Node Representation
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Part 199: LinkedList as a List vs as a Deque/Queue
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Part 200: ArrayList vs LinkedList: Comprehensive Benchmark and Decision Guide
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Part 201: Legacy List Implementations: Vector and Stack (Why They Are Obsolete)
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Part 202: The java.util.Set Interface: Uniqueness and Mathematical Set Abstraction
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Part 203: HashSet Architecture: Internal Backing by HashMap and Bucketing
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Part 204: How HashSet Enforces Uniqueness: The Interplay of hashCode() and equals()
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Part 205: LinkedHashSet: Maintaining Insertion Order with Doubly-Linked Buckets
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Part 206: The SortedSet and NavigableSet Interfaces: Range Views and Navigation
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Part 207: TreeSet Architecture: Red-Black Self-Balancing Binary Search Tree
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Part 208: Natural Ordering with java.lang.Comparable: Implementing compareTo()
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Part 209: Custom Ordering with java.util.Comparator: Comparing Methods and Lambdas
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Part 210: Comparable vs Comparator: Detailed Comparison and Use Cases
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Part 211: The java.util.Queue Interface: FIFO Semantics and Work Queues
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Part 212: PriorityQueue: Min-Heap / Max-Heap Mechanics and Priority Scheduling
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Part 213: The java.util.Deque Interface: Double-Ended Queue Operations
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Part 214: ArrayDeque: High-Performance Circular Array Queue and Stack Replacement
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Part 215: The java.util.Map Interface: Key-Value Associations and Entry Sets
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Part 216: HashMap Architecture: Buckets, Node Table, Hash Function, and Index Calculation
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Part 217: HashMap Collision Resolution: Chaining via Linked List and Treeification
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Part 218: HashMap Load Factor, Initial Capacity, and Threshold-Based Rehashing
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Part 219: Mutating Keys in a HashMap: The Peril of Mutable Keys
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Part 220: LinkedHashMap: Maintaining Insertion Order and Access Order
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Part 221: Building an LRU (Least Recently Used) Cache Using LinkedHashMap
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Part 222: The SortedMap and NavigableMap Interfaces: Key Ranges and Successors
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Part 223: TreeMap: Red-Black Tree Implementation for Sorted Key-Value Storage
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Part 224: Legacy Map Implementations: Hashtable and Properties
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Part 225: Working with Configuration Files Using java.util.Properties
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Part 226: IdentityHashMap: Key Comparison by Reference (==)
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Part 227: WeakHashMap: Memory-Sensitive Caching with Weak Reference Keys
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Part 228: Iterators in Java: The java.util.Iterator Interface
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Part 229: Bidirectional Navigation with java.util.ListIterator
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Part 230: Fail-Fast Iterators vs Fail-Safe Iterators: ConcurrentModificationException
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Part 231: The java.util.Collections Utility Class: Sorting, Searching, and Shuffling
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Part 232: Creating Unmodifiable Collections: Collections.unmodifiableList/Map/Set
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Part 233: Synchronized Collection Wrappers: Collections.synchronizedList/Map
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Part 234: Immutable Collection Factories (Java 9): List.of(), Set.of(), Map.of()
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Part 235: Factory Methods vs Unmodifiable Wrappers: Deep Dive into Immutability
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Part 236: Sequenced Collections (Java 21): SequencedCollection, SequencedSet, SequencedMap
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Part 237: Converting Between Arrays and Collections: Arrays.asList() and List.toArray()
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Part 238: High-Performance Primitive Collections: Avoid Boxing Overhead
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Part 239: Spliterators: Parallel Traversal and Partitioning in Java
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Part 240: Choosing the Right Collection: Practical Flowchart and Decision Matrix
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Part 241: Java I/O Overview: Stream-Based Architecture and Paradigms
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Part 242: Byte Streams vs Character Streams: 8-bit Binary vs 16-bit Unicode
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Part 243: The InputStream and OutputStream Abstract Base Classes
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Part 244: File Byte I/O: FileInputStream and FileOutputStream
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Part 245: The Reader and Writer Abstract Base Classes
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Part 246: File Character I/O: FileReader and FileWriter with Encodings
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Part 247: Buffered Streams: BufferedInputStream and BufferedOutputStream
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Part 248: Buffered Readers and Writers: BufferedReader and BufferedWriter
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Part 249: Data Streams: DataInputStream and DataOutputStream for Primitives
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Part 250: Formatted Printing: PrintStream and PrintWriter
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Part 251: Working with the File System: The Classic java.io.File Class
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Part 252: Object Serialization: Why and How Java Serializes Objects
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Part 253: Implementing java.io.Serializable: The Role of serialVersionUID
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Part 254: The transient Keyword: Preventing Field Serialization
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Part 255: Custom Serialization: Implementing writeObject and readObject
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Part 256: The java.io.Externalizable Interface: Complete Control Over Serialization
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Part 257: Serialization Vulnerabilities and Secure Deserialization Best Practices
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Part 258: Introduction to Java NIO (New I/O): Non-Blocking and Buffer-Oriented Architecture
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Part 259: Java NIO Buffers: ByteBuffer, CharBuffer, Position, Limit, and Capacity
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Part 260: Buffer Operations: flip(), clear(), rewind(), compact(), and mark()
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Part 261: Java NIO Channels: FileChannel, SocketChannel, and ServerSocketChannel
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Part 262: Fast File Copying Using FileChannel.transferTo() and Zero-Copy
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Part 263: Memory-Mapped Files with MappedByteBuffer for High-Throughput I/O
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Part 264: Java NIO.2 Overview: The Modern File System API (Java 7)
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Part 265: The java.nio.file.Path and Paths Classes: Fluent Path Manipulation
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Part 266: The java.nio.file.Files Class: Reading, Writing, Copying, and Deleting Files
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Part 267: Walking Directory Trees: Files.walk(), Files.find(), and DirectoryStream
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Part 268: File Attributes and Metadata: BasicFileAttributes and File Permissions
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Part 269: The WatchService API: Monitoring Directory and File System Changes in Real Time
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Part 270: Migrating from Legacy java.io.File to Modern java.nio.file.Path
271
Part 271: Concurrency vs Parallelism: Core Operating System and Hardware Concepts
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Part 272: Processes vs Threads: Address Spaces and Context Switching
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Part 273: The Java Thread Lifecycle: New, Runnable, Blocked, Waiting, Timed Waiting, Terminated
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Part 274: Creating Threads: Extending java.lang.Thread Class
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Part 275: Creating Threads: Implementing java.lang.Runnable Interface
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Part 276: Thread Priority: Setting Priorities and OS Thread Scheduling
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Part 277: Daemon Threads: Background Service Threads and JVM Shutdown
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Part 278: Core Thread Methods: start() vs run()
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Part 279: Core Thread Methods: Pausing Execution and Thread Suspension
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Part 280: Core Thread Methods: Thread.join() and Coordinating Thread Completion
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Part 281: Core Thread Methods: Thread.yield() and CPU Cooperative Scheduling
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Part 282: Thread Interruption Mechanism: interrupt(), isInterrupted(), and interrupted()
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Part 283: Concurrency Hazards: Race Conditions and Critical Sections
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Part 284: Shared Memory and Visibility: The Java Memory Model (JMM) Primer
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Part 285: Thread Synchronization: Synchronized Methods
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Part 286: Thread Synchronization: Synchronized Blocks and Granular Locking
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Part 287: Intrinsic Locks: Object-Level Locks vs Class-Level Locks
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Part 288: Inter-Thread Communication: The wait(), notify(), and notifyAll() Methods
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Part 289: Solving the Classic Producer-Consumer Problem Using Intrinsic Locks
290
Part 290: Concurrency Pitfalls: Deadlock Conditions and Deadlock Detection
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Part 291: Concurrency Pitfalls: Livelock, Thread Starvation, and Priority Inversion
292
Part 292: The volatile Keyword: Ensuring Memory Visibility and Preventing Reordering
293
Part 293: Limitations of volatile: Why Volatile Does Not Guarantee Atomicity
294
Part 294: Atomic Variables: AtomicInteger, AtomicLong, AtomicBoolean, and AtomicReference
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Part 295: Hardware-Level Synchronization: Compare-And-Swap (CAS) Mechanics
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Part 296: High-Throughput Accumulators: LongAdder and LongAccumulator
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Part 297: The java.util.concurrent Package: Overview and Architecture
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Part 298: The ThreadLocal Class: Providing Per-Thread Independent Variables
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Part 299: Preventing Memory Leaks with ThreadLocal.remove() in Thread Pools
300
Part 300: The Executor Framework: Decoupling Task Submission from Task Execution
301
Part 301: The Executor and ExecutorService Interfaces
302
Part 302: Creating Thread Pools with Executors: newFixedThreadPool and newCachedThreadPool
303
Part 303: Creating Single-Thread Pools and Work-Stealing Pools
304
Part 304: Deep Dive into ThreadPoolExecutor: Core Pool Size, Max Pool Size, and Keep-Alive
305
Part 305: Work Queue Types in Thread Pools: ArrayBlockingQueue, LinkedBlockingQueue, SynchronousQueue
306
Part 306: Handling Overloaded Pools: RejectedExecutionHandler Strategies
307
Part 307: Graceful Shutdown of Thread Pools: shutdown(), shutdownNow(), and awaitTermination()
308
Part 308: Returning Results with java.util.concurrent.Callable and Future
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Part 309: Future Operations: get(), isDone(), and cancel()
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Part 310: Asynchronous Programming with CompletableFuture (Java 8)
311
Part 311: Transforming Futures: thenApply(), thenAccept(), and thenRun()
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Part 312: Composing and Combining Futures: thenCompose() and thenCombine()
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Part 313: Aggregating Futures: CompletableFuture.allOf() and anyOf()
314
Part 314: Exception Handling in CompletableFuture: exceptionally() and handle()
315
Part 315: Explicit Locks: The java.util.concurrent.locks.Lock Interface
316
Part 316: ReentrantLock: Explicit Locking, Fair Locks, and Timed Lock Acquisition (tryLock)
317
Part 317: Read-Optimized Locking: ReentrantReadWriteLock
318
Part 318: Optimistic Locking with StampedLock (Java 8)
319
Part 319: Condition Variables: Condition Interface (await, signal, signalAll)
320
Part 320: Coordination Primitives: CountDownLatch for Barrier Synchronization
321
Part 321: Coordination Primitives: CyclicBarrier for Cyclic Synchronization
322
Part 322: Resource Throttling with Semaphore: Regulating Concurrent Access
323
Part 323: Thread Data Exchange with Exchanger
324
Part 324: Flexible Multi-Phase Coordination with Phaser
325
Part 325: Fork/Join Framework: Recursive Computation and Work-Stealing Algorithm
326
Part 326: Java Evolution: From Release Cadence to Modern Long-Term Support (LTS) Cycles
327
Part 327: Lambda Expressions: Syntax, Parameter Lists, and Expression Bodies
328
Part 328: Target Typing and Effectively Final Variables in Lambdas
329
Part 329: Built-in Functional Interfaces: Predicate<T> and Boolean Evaluations
330
Part 330: Built-in Functional Interfaces: Function<T, R> and Transformations
331
Part 331: Built-in Functional Interfaces: Consumer<T> and Side Effects
332
Part 332: Built-in Functional Interfaces: Supplier<T> and Lazy Value Generation
333
Part 333: Specialized Functional Interfaces: UnaryOperator, BinaryOperator, and Bi-Variants
334
Part 334: Method References: Reference to a Static Method (Class::staticMethod)
335
Part 335: Method References: Reference to an Instance Method of a Specific Object
336
Part 336: Method References: Reference to an Instance Method of an Arbitrary Object
337
Part 337: Constructor References: Instantiating Objects via ClassName::new
338
Part 338: Introduction to Stream API: Declarative Data Processing
339
Part 339: Streams vs Collections: In-Memory Storage vs Pipelined Computation
340
Part 340: Stream Lifecycle: Source, Intermediate Operations, and Terminal Operation
341
Part 341: Intermediate Operations: filter(), map(), and flatMap()
342
Part 342: Intermediate Operations: distinct(), sorted(), peek(), limit(), and skip()
343
Part 343: Terminal Operations: forEach(), count(), min(), max(), and collect()
344
Part 344: Terminal Operations: Matching (anyMatch, allMatch, noneMatch) and Searching
345
Part 345: Stream Reduction: The reduce() Operation for Custom Aggregations
346
Part 346: The Collectors Utility: toList(), toSet(), toMap(), and Unmodifiable Collections
347
Part 347: Advanced Grouping: Collectors.groupingBy() and Downstream Collectors
348
Part 348: Advanced Partitioning: Collectors.partitioningBy()
349
Part 349: Specialized Primitive Streams: IntStream, LongStream, and DoubleStream
350
Part 350: Parallel Streams: Leveraging Multi-Core Processors and Common ForkJoinPool
351
Part 351: Parallel Streams Pitfalls: Thread-Safety, Overhead, and When NOT to Use
352
Part 352: The java.util.Optional Class: Eliminating NullPointerException
353
Part 353: Optional Methods: of(), ofNullable(), empty(), isPresent(), and ifPresent()
354
Part 354: Optional Unwrapping: orElse(), orElseGet(), and orElseThrow()
355
Part 355: Transforming Optional: map(), flatMap(), and filter()
356
Part 356: Modern Date and Time API (Java 8 / java.time): Design and Immutability
357
Part 357: Working with Local Dates: LocalDate, LocalTime, and LocalDateTime
358
Part 358: Time Zones and Timestamps: ZonedDateTime, ZoneId, and Instant
359
Part 359: Measuring Time: Duration (Time-Based) vs Period (Date-Based)
360
Part 360: Formatting and Parsing Dates with DateTimeFormatter
361
Part 361: Java 9: Java Platform Module System (JPMS) and module-info.java
362
Part 362: Java 10: Local-Variable Type Inference with var
363
Part 363: Java 11: HTTP Client API Supporting HTTP/2 and WebSockets
364
Part 364: Virtual Threads (Project Loom, Java 21): Architecture and Mechanics
365
Part 365: Concurrency with Virtual Threads: Structured Concurrency and Scoped Values
366
Part 366: Detailed JVM Architecture: Subsystems and System Execution Flow
367
Part 367: ClassLoader Architecture: Bootstrap, Platform, and Application ClassLoaders
368
Part 368: Class Loading Lifecycle: Loading, Linking, and Initialization
369
Part 369: JVM Runtime Data Areas: Method Area / Metaspace vs Java Heap
370
Part 370: JVM Runtime Data Areas: JVM Stacks, PC Registers, and Native Stacks
371
Part 371: Java Heap Layout: Young Generation (Eden, S0, S1) and Old Generation
372
Part 372: Object Allocation in Eden, Minor GC, and Object Promotion
373
Part 373: Garbage Collection Roots: What Keeps an Object Alive in the JVM
374
Part 374: Garbage Collection Algorithms: Mark-Sweep, Mark-Sweep-Compact, and Copying
375
Part 375: Generational Garbage Collection Hypothesis
376
Part 376: HotSpot Garbage Collectors: Serial GC and Parallel (Throughput) GC
377
Part 377: HotSpot Garbage Collectors: Garbage-First (G1) Garbage Collector
378
Part 378: Ultra-Low Latency Garbage Collectors: ZGC and Shenandoah
379
Part 379: Essential JVM Tuning Options: Memory Sizing (-Xms, -Xmx, -Xss)
380
Part 380: Garbage Collector Selection and Tuning Flags
381
Part 381: Diagnosing Memory Leaks in Java: Static References and Listeners
382
Part 382: Analyzing Heap Dumps with Eclipse MAT (Memory Analyzer Tool)
383
Part 383: Command-Line Diagnostic Tools: jps, jstat, jcmd, jstack, and jmap
384
Part 384: Java Flight Recorder (JFR) and JDK Mission Control (JMC)
385
Part 385: Just-In-Time (JIT) Optimization: Method Inlining, Escape Analysis, Loop Unrolling
386
Part 386: Java Reflection API: Inspecting Classes, Methods, Fields at Runtime
387
Part 387: Accessing and Modifying Private Fields and Methods via Reflection
388
Part 388: Dynamic Proxies in Java: java.lang.reflect.Proxy and InvocationHandler
389
Part 389: Java Annotations Overview: Metadata in Source Code
390
Part 390: Standard Built-in Annotations: @Override, @Deprecated, @SuppressWarnings
391
Part 391: Meta-Annotations: @Target, @Retention, @Documented, and @Inherited
392
Part 392: Creating Custom Annotations and Processing Them at Runtime
393
Part 393: Creational Design Patterns: Singleton Pattern
394
Part 394: Creational Design Patterns: Factory Method and Abstract Factory
395
Part 395: Creational Design Patterns: Builder Pattern and Fluent APIs
396
Part 396: Structural Design Patterns: Adapter, Decorator, and Facade Patterns
397
Part 397: Structural Design Patterns: Proxy Pattern and Virtual Proxies
398
Part 398: Behavioral Design Patterns: Strategy Pattern with Java Lambdas
399
Part 399: Behavioral Design Patterns: Observer Pattern, Command Pattern, and Template Method
400
Part 400: Build Tools: Apache Maven vs Gradle Architecture
401
Part 401: Automated Testing: Unit Testing with JUnit 5 (Jupiter)
402
Part 402: Mocking Dependencies: Mockito Framework
403
Part 403: Database Connectivity (JDBC): DriverManager, Connection, PreparedStatement
404
Part 404: Connection Pooling with HikariCP and Transition to Spring Data JPA
405
Part 405: Enterprise Java Masterclass: Production Deployment, 12-Factor, and Security
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  4. Part 1: Introduction to Java: History, Evolution, and Philosophy (WORA)

Part 1: Introduction to Java: History, Evolution, and Philosophy (WORA)

Part 1 Technology Updated September 13, 2026

Part 1: Introduction to Java

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