Home
About
Blog
Tutorials
Shop
Contact

Login

Home
About
Blog
Tutorials
Shop
Contact

Technology 407 Topics

Java Full Tutorial

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

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

Part 2: Java Architecture: JDK, JRE, and JVM Explained

Part 3: JVM Internals: ClassLoader Subsystem, Memory Areas, and Execution Engine

Part 4: JIT Compiler, HotSpot Engine, and Ahead-Of-Time (AOT) Compilation

Part 5: Setting Up Java: OpenJDK, Oracle JDK, and Configuring JAVA_HOME & PATH

Part 6: Anatomy of a Java Program: Understanding public static void main(String[] args)

Part 7: Java Source File Structure, Comments, and Coding Conventions

Part 8: Identifiers, Reserved Keywords, and Literals in Java

Part 9: Java Primitive Data Types (byte, short, int, long, float, double, char, boolean)

Part 10: Floating-Point Precision and the IEEE 754 Standard in Java

Part 11: Variables in Java: Local, Instance, and Static Variables

Part 12: Variable Scope, Lifetime, and Default Initialization

Part 13: Type Casting and Conversion: Widening vs Narrowing Casting

Part 14: Arithmetic and Assignment Operators in Java

Part 15: Relational and Equality Operators: == vs .equals() Primer

Part 16: Logical Operators and Short-Circuit Evaluation (&&, ||, !)

Part 17: Bitwise and Bit Shift Operators (&, |, ^, ~, <<, >>, >>>)

Part 18: Ternary Operator (?:) and Expression Rules

Part 19: The instanceof Operator and Type Checking

Part 20: Control Flow: if, if-else, and Nested Conditional Logic

Part 21: Control Flow: if-else-if Ladders and Best Practices

Part 22: The Classic switch Statement: Rules, Fall-through, and break

Part 23: Modern Switch Expressions and Pattern Matching (Java 14 - 21)

Part 24: The while Loop: Entry-Controlled Iteration

Part 25: The do-while Loop: Exit-Controlled Iteration

Part 26: The Standard for Loop: Initialization, Condition, and Update

Part 27: The Enhanced for-each Loop: Iterating Over Arrays and Iterables

Part 28: Jump Statements: break, continue, and Labeled Statements

Part 29: Introduction to Single-Dimensional Arrays: Declaration, Instantiation, and Access

Part 30: Array Memory Allocation and Default Values in Java

Part 31: Multidimensional Arrays: Matrices and Grid Data Structures

Part 32: Jagged (Ragged) Arrays in Java

Part 33: The java.util.Arrays Utility Class: Sorting, Searching, and Copying

Part 34: Command-Line Arguments: Parsing and Best Practices

Part 35: Console I/O: Scanner, BufferedReader, and Formatted Output (printf)

Part 36: Principles of Object-Oriented Programming: A High-Level Overview

Part 37: Classes and Objects: Blueprints vs Concrete Instances

Part 38: Memory Representation of Objects: Stack vs Heap Allocation

Part 39: Java Constructors: Role, Rules, and Execution Lifecycle

Part 40: Default Constructors vs Parameterized Constructors

Part 41: Constructor Overloading and Initialization Logic

Part 42: Constructor Chaining and the this() Invocation

Part 43: The this Keyword: Resolving Shadowed Variables and Instance Passing

Part 44: Methods in Java: Signatures, Return Types, and Parameters

Part 45: Parameter Passing Mechanism: Why Java is Strictly Pass-by-Value

Part 46: Method Overloading: Compile-Time Polymorphism and Promotion Rules

Part 47: Method Overloading Ambiguities and Pitfalls

Part 48: Encapsulation: Data Hiding, Getters, Setters, and Invariants

Part 49: JavaBeans Specification and POJO Conventions

Part 50: Access Modifiers: public, protected, default, and private

Part 51: Inheritance Fundamentals: The extends Keyword and IS-A Relationship

Part 52: Types of Inheritance: Single, Multilevel, and Hierarchical

Part 53: Why Java Does Not Support Multiple Inheritance with Classes

Part 54: The super Keyword: Accessing Parent State and Constructors (super())

Part 55: Constructor Execution Order in Class Hierarchies

Part 56: Method Overriding: Runtime Polymorphism and Rules

Part 57: The @Override Annotation and Compile-Time Checks

Part 58: Covariant Return Types in Method Overriding

Part 59: Dynamic Method Dispatch: How JVM Resolves Virtual Methods at Runtime

Part 60: Runtime Polymorphism: Upcasting, Downcasting, and ClassCastException

Part 61: Abstraction in Java: Concept, Design Benefits, and Implementation

Part 62: Abstract Classes: Rules, Abstract Methods, and Partial Implementations

Part 63: Interfaces in Java: Contracts, Complete Abstraction, and the implements Keyword

Part 64: Abstract Class vs Interface: When to Use Which

Part 65: Multiple Inheritance with Interfaces and Name Collisions

Part 66: Interface Evolution: default Methods in Java 8

Part 67: Static Methods in Interfaces (Java 8)

Part 68: Private Methods in Interfaces (Java 9)

Part 69: Functional Interfaces and the @FunctionalInterface Annotation

Part 70: Marker Interfaces: Serializable, Cloneable, and Remote

Part 71: The final Keyword: Final Variables and Constants

Part 72: The final Keyword: Final Methods (Preventing Overriding)

Part 73: The final Keyword: Final Classes (Preventing Inheritance)

Part 74: Blank Final Variables and Static Final Constants

Part 75: The static Keyword: Static Variables and Class-Level State

Part 76: Static Methods: Class Utilities and Restrictions

Part 77: Static Initialization Blocks vs Instance Initialization Blocks

Part 78: The Root java.lang.Object Class and Its Universal Methods

Part 79: Overriding toString(): Providing Meaningful Text Representation

Part 80: Overriding equals() and the General Contract

Part 81: Overriding hashCode() and the Contract with equals()

Part 82: Object Cloning: Shallow Copy vs Deep Copy and Cloneable

Part 83: Garbage Collection Finalization: finalize() Deprecation and Cleaner

Part 84: Java Packages: Namespace Management, Package Statement, and Imports

Part 85: Static Imports and Best Practices in Package Design

Part 86: Inner Classes: Overview and Categorization

Part 87: Member Inner Classes: Syntax, Outer Reference, and Instantiation

Part 88: Local Inner Classes: Scope and Effectively Final Variables

Part 89: Anonymous Inner Classes: Creating One-Off Implementations

Part 90: Static Nested Classes: Independence from Outer Class Instances

Part 91: Enumerations in Java: The enum Keyword and Type Safety

Part 92: Enum Properties: Methods, Fields, and Constructors

Part 93: Enum Methods: values(), valueOf(), ordinal(), and name()

Part 94: Enums with Constant-Specific Class Bodies and Abstract Methods

Part 95: Enums Implementing Interfaces and Enum Design Patterns

Part 96: EnumSet and EnumMap: High-Performance Specialized Collections

Part 97: Java Records (Java 14-16): Immutable Data Carriers

Part 98: Anatomy of a Record: Canonical Constructor, Components, and Accessors

Part 99: Compact Constructors and Custom Validation in Records

Part 100: Adding Methods, Static Fields, and Interfaces to Records

Part 101: Sealed Classes and Interfaces (Java 15-17): Restricting Subtyping

Part 102: Sealed Class Syntax: sealed, permits, final, non-sealed

Part 103: Pattern Matching for switch with Sealed Classes

Part 104: Value Objects vs Entities: Domain-Driven Design in Java

Part 105: Immutability in Java: Rules for Designing Bulletproof Immutable Classes

Part 106: Defensive Copying: Protecting Class Invariants from External Modification

Part 107: The Null Object Pattern in Java

Part 108: Composition vs Inheritance: Favoring Composition in Java Architecture

Part 109: Coupling and Cohesion in Java Object Design

Part 110: Law of Demeter and Principle of Least Knowledge

Part 111: String Fundamentals: Why Strings are Immutable in Java

Part 112: String Memory Optimization: The String Constant Pool (SCP)

Part 113: String Creation: String Literals vs new String() Operator

Part 114: The intern() Method: Forcing Strings into the Constant Pool

Part 115: Core String Methods: Inspection (length, isEmpty, charAt, contains)

Part 116: Core String Methods: Transformation (substring, replace, toLowerCase)

Part 117: Core String Methods: Trimming & Stripping (trim vs strip)

Part 118: String Splitting and Joining: split(), String.join(), and Delimiters

Part 119: String Concatenation: + Operator vs concat() vs StringBuilder

Part 120: StringBuilder Class: Mutable String Manipulation for Single Threads

Part 121: StringBuffer Class: Thread-Safe Mutable String Manipulation

Part 122: Performance Benchmarks: String vs StringBuilder vs StringBuffer

Part 123: String Formatting: String.format(), formatted(), and Specifiers

Part 124: Text Blocks (Java 13-15): Multiline Strings, Formatting, and Escape Rules

Part 125: Regular Expressions (Regex) in Java: Syntax and Foundations

Part 126: The java.util.regex.Pattern and Matcher Classes

Part 127: Advanced Regex: Groups, Capturing, and Lookahead/Lookbehind

Part 128: Validating Inputs (Emails, Phone Numbers, UUIDs) with Java Regex

Part 129: Java Wrapper Classes: Integer, Double, Boolean, and More

Part 130: Primitive Wrapper Methods: Parsing, Conversion, and Constants

Part 131: Autoboxing and Unboxing: Mechanics and Performance Overhead

Part 132: The Integer Cache Mechanism (-128 to 127) and Equality Traps

Part 133: java.lang.Math Class: Constants, Trigonometry, and Rounding

Part 134: Generating Random Numbers: Random vs ThreadLocalRandom vs SecureRandom

Part 135: The java.util.UUID Class: Universally Unique Identifier Generation

Part 136: Overview of Exception Handling in Java: Philosophy and Benefits

Part 137: The Exception Hierarchy: Throwable, Error, and Exception

Part 138: Checked Exceptions: Compile-Time Enforcement and Rationale

Part 139: Unchecked Exceptions (RuntimeException): Logic Errors and Bugs

Part 140: Critical Errors: OutOfMemoryError, StackOverflowError, and NoClassDefFoundError

Part 141: The try-catch Block: Catching and Handling Exceptions Gracefully

Part 142: Execution Flow of try-catch-finally Under Normal and Exceptional Scenarios

Part 143: The finally Block: Guarantees, Edge Cases, and Resource Cleanup

Part 144: Scenarios Where finally Does Not Execute (System.exit, Fatal Crash)

Part 145: Handling Multiple Exceptions: Order of Catch Blocks and Specificity

Part 146: Multi-Catch Block (Java 7): Combining Related Exception Handlers

Part 147: Nested try-catch Blocks and Layered Error Handling

Part 148: The throw Keyword: Explicitly Raising Exceptions

Part 149: The throws Keyword: Declaring Exception Signatures in Method Contracts

Part 150: Creating Custom Checked Exceptions: Best Practices and Constructors

Part 151: Creating Custom Unchecked Exceptions: Best Practices for Business Logic

Part 152: Exception Chaining: Wrapping Exceptions and Preserving Root Causes

Part 153: Try-With-Resources (Java 7): Automatic Resource Management

Part 154: The java.lang.AutoCloseable and java.io.Closeable Interfaces

Part 155: Suppressed Exceptions in Try-With-Resources and getSuppressed()

Part 156: Common Exceptions: Diagnosing and Fixing NullPointerException (NPE)

Part 157: Common Exceptions: ArrayIndexOutOfBoundsException & StringIndexOutOfBoundsException

Part 158: Common Exceptions: ClassCastException and Safe Downcasting

Part 159: Common Exceptions: NumberFormatException and Safe Number Parsing

Part 160: Common Exceptions: IllegalArgumentException and Parameter Validation

Part 161: Common Exceptions: IllegalStateException and State Transitions

Part 162: Common Exceptions: UnsupportedOperationException and Immutable Collections

Part 163: Anti-Patterns in Exception Handling: Swallowing Exceptions and Catch-Alls

Part 164: Logging Exceptions: Integrating SLF4J and Logback for Production Diagnostics

Part 165: Modern Exception Strategies: Functional Error Handling with Result/Either Patterns

Part 166: Introduction to Generics: Why Java Needed Parametric Polymorphism

Part 167: Type Safety at Compile Time: Eliminating Explicit Casts

Part 168: Generic Classes: Definition, Type Parameters (<T>), and Instantiation

Part 169: Generic Classes with Multiple Type Parameters (<K, V>)

Part 170: Generic Methods: Declaring Method-Level Type Parameters

Part 171: Generic Interfaces: Defining Flexible Service Contracts

Part 172: Generic Constructors: Parameterizing Object Creation

Part 173: Bounded Type Parameters: Upper Bounds (<T extends Number>)

Part 174: Multiple Bounds in Generics (<T extends Comparable<T> & Serializable>)

Part 175: Wildcards in Generics: Unbounded Wildcards (?)

Part 176: Upper Bounded Wildcards (? extends Number)

Part 177: Lower Bounded Wildcards (? super Integer)

Part 178: The PECS Rule: Producer Extends, Consumer Super Explained

Part 179: Subtyping in Generics: Why List<String> is NOT a List<Object>

Part 180: Type Erasure: How the JVM Implements Generics at Bytecode Level

Part 181: Bridge Methods: Preserving Polymorphism Under Type Erasure

Part 182: Restrictions on Generics: Cannot Instantiate Type Parameters with Primitives

Part 183: Restrictions on Generics: Cannot Create Instances of Type Parameters (new T())

Part 184: Restrictions on Generics: Cannot Declare Static Fields of Generic Type

Part 185: Restrictions on Generics: Cannot Create Generic Arrays (new T[10])

Part 186: Restrictions on Generics: Cannot Use instanceof with Parameterized Types

Part 187: Restrictions on Generics: Exception Handling Limitations with Type Parameters

Part 188: Raw Types in Java: Backward Compatibility and Compiler Warnings

Part 189: Type Tokens and Super Type Tokens in Java Frameworks

Part 190: Generic DAO Pattern: Building Reusable Data Access Objects

Part 191: Java Collections Framework (JCF): Architecture, Benefits, and Core Hierarchy

Part 192: The java.lang.Iterable Interface: The Root of Collection Traversal

Part 193: The java.util.Collection Interface: Common Collection Operations

Part 194: The java.util.List Interface: Positional Access and Ordered Collections

Part 195: ArrayList Architecture: Internal Dynamic Array Resizing and Growth Factor

Part 196: ArrayList Performance Analysis: Time Complexities of Get, Add, and Remove

Part 197: ArrayList Best Practices: Capacity Management and trimToSize()

Part 198: LinkedList Architecture: Doubly-Linked Node Representation

Part 199: LinkedList as a List vs as a Deque/Queue

Part 200: ArrayList vs LinkedList: Comprehensive Benchmark and Decision Guide

Part 201: Legacy List Implementations: Vector and Stack (Why They Are Obsolete)

Part 202: The java.util.Set Interface: Uniqueness and Mathematical Set Abstraction

Part 203: HashSet Architecture: Internal Backing by HashMap and Bucketing

Part 204: How HashSet Enforces Uniqueness: The Interplay of hashCode() and equals()

Part 205: LinkedHashSet: Maintaining Insertion Order with Doubly-Linked Buckets

Part 206: The SortedSet and NavigableSet Interfaces: Range Views and Navigation

Part 207: TreeSet Architecture: Red-Black Self-Balancing Binary Search Tree

Part 208: Natural Ordering with java.lang.Comparable: Implementing compareTo()

Part 209: Custom Ordering with java.util.Comparator: Comparing Methods and Lambdas

Part 210: Comparable vs Comparator: Detailed Comparison and Use Cases

Part 211: The java.util.Queue Interface: FIFO Semantics and Work Queues

Part 212: PriorityQueue: Min-Heap / Max-Heap Mechanics and Priority Scheduling

Part 213: The java.util.Deque Interface: Double-Ended Queue Operations

Part 214: ArrayDeque: High-Performance Circular Array Queue and Stack Replacement

Part 215: The java.util.Map Interface: Key-Value Associations and Entry Sets

Part 216: HashMap Architecture: Buckets, Node Table, Hash Function, and Index Calculation

Part 217: HashMap Collision Resolution: Chaining via Linked List and Treeification

Part 218: HashMap Load Factor, Initial Capacity, and Threshold-Based Rehashing

Part 219: Mutating Keys in a HashMap: The Peril of Mutable Keys

Part 220: LinkedHashMap: Maintaining Insertion Order and Access Order

Part 221: Building an LRU (Least Recently Used) Cache Using LinkedHashMap

Part 222: The SortedMap and NavigableMap Interfaces: Key Ranges and Successors

Part 223: TreeMap: Red-Black Tree Implementation for Sorted Key-Value Storage

Part 224: Legacy Map Implementations: Hashtable and Properties

Part 225: Working with Configuration Files Using java.util.Properties

Part 226: IdentityHashMap: Key Comparison by Reference (==)

Part 227: WeakHashMap: Memory-Sensitive Caching with Weak Reference Keys

Part 228: Iterators in Java: The java.util.Iterator Interface

Part 229: Bidirectional Navigation with java.util.ListIterator

Part 230: Fail-Fast Iterators vs Fail-Safe Iterators: ConcurrentModificationException

Part 231: The java.util.Collections Utility Class: Sorting, Searching, and Shuffling

Part 232: Creating Unmodifiable Collections: Collections.unmodifiableList/Map/Set

Part 233: Synchronized Collection Wrappers: Collections.synchronizedList/Map

Part 234: Immutable Collection Factories (Java 9): List.of(), Set.of(), Map.of()

Part 235: Factory Methods vs Unmodifiable Wrappers: Deep Dive into Immutability

Part 236: Sequenced Collections (Java 21): SequencedCollection, SequencedSet, SequencedMap

Part 237: Converting Between Arrays and Collections: Arrays.asList() and List.toArray()

Part 238: High-Performance Primitive Collections: Avoid Boxing Overhead

Part 239: Spliterators: Parallel Traversal and Partitioning in Java

Part 240: Choosing the Right Collection: Practical Flowchart and Decision Matrix

Part 241: Java I/O Overview: Stream-Based Architecture and Paradigms

Part 242: Byte Streams vs Character Streams: 8-bit Binary vs 16-bit Unicode

Part 243: The InputStream and OutputStream Abstract Base Classes

Part 244: File Byte I/O: FileInputStream and FileOutputStream

Part 245: The Reader and Writer Abstract Base Classes

Part 246: File Character I/O: FileReader and FileWriter with Encodings

Part 247: Buffered Streams: BufferedInputStream and BufferedOutputStream

Part 248: Buffered Readers and Writers: BufferedReader and BufferedWriter

Part 249: Data Streams: DataInputStream and DataOutputStream for Primitives

Part 250: Formatted Printing: PrintStream and PrintWriter

Part 251: Working with the File System: The Classic java.io.File Class

Part 252: Object Serialization: Why and How Java Serializes Objects

Part 253: Implementing java.io.Serializable: The Role of serialVersionUID

Part 254: The transient Keyword: Preventing Field Serialization

Part 255: Custom Serialization: Implementing writeObject and readObject

Part 256: The java.io.Externalizable Interface: Complete Control Over Serialization

Part 257: Serialization Vulnerabilities and Secure Deserialization Best Practices

Part 258: Introduction to Java NIO (New I/O): Non-Blocking and Buffer-Oriented Architecture

Part 259: Java NIO Buffers: ByteBuffer, CharBuffer, Position, Limit, and Capacity

Part 260: Buffer Operations: flip(), clear(), rewind(), compact(), and mark()

Part 261: Java NIO Channels: FileChannel, SocketChannel, and ServerSocketChannel

Part 262: Fast File Copying Using FileChannel.transferTo() and Zero-Copy

Part 263: Memory-Mapped Files with MappedByteBuffer for High-Throughput I/O

Part 264: Java NIO.2 Overview: The Modern File System API (Java 7)

Part 265: The java.nio.file.Path and Paths Classes: Fluent Path Manipulation

Part 266: The java.nio.file.Files Class: Reading, Writing, Copying, and Deleting Files

Part 267: Walking Directory Trees: Files.walk(), Files.find(), and DirectoryStream

Part 268: File Attributes and Metadata: BasicFileAttributes and File Permissions

Part 269: The WatchService API: Monitoring Directory and File System Changes in Real Time

Part 270: Migrating from Legacy java.io.File to Modern java.nio.file.Path

Part 271: Concurrency vs Parallelism: Core Operating System and Hardware Concepts

Part 272: Processes vs Threads: Address Spaces and Context Switching

Part 273: The Java Thread Lifecycle: New, Runnable, Blocked, Waiting, Timed Waiting, Terminated

Part 274: Creating Threads: Extending java.lang.Thread Class

Part 275: Creating Threads: Implementing java.lang.Runnable Interface

Part 276: Thread Priority: Setting Priorities and OS Thread Scheduling

Part 277: Daemon Threads: Background Service Threads and JVM Shutdown

Part 278: Core Thread Methods: start() vs run()

Part 279: Core Thread Methods: Pausing Execution and Thread Suspension

Part 280: Core Thread Methods: Thread.join() and Coordinating Thread Completion

Part 281: Core Thread Methods: Thread.yield() and CPU Cooperative Scheduling

Part 282: Thread Interruption Mechanism: interrupt(), isInterrupted(), and interrupted()

Part 283: Concurrency Hazards: Race Conditions and Critical Sections

Part 284: Shared Memory and Visibility: The Java Memory Model (JMM) Primer

Part 285: Thread Synchronization: Synchronized Methods

Part 286: Thread Synchronization: Synchronized Blocks and Granular Locking

Part 287: Intrinsic Locks: Object-Level Locks vs Class-Level Locks

Part 288: Inter-Thread Communication: The wait(), notify(), and notifyAll() Methods

Part 289: Solving the Classic Producer-Consumer Problem Using Intrinsic Locks

Part 290: Concurrency Pitfalls: Deadlock Conditions and Deadlock Detection

Part 291: Concurrency Pitfalls: Livelock, Thread Starvation, and Priority Inversion

Part 292: The volatile Keyword: Ensuring Memory Visibility and Preventing Reordering

Part 293: Limitations of volatile: Why Volatile Does Not Guarantee Atomicity

Part 294: Atomic Variables: AtomicInteger, AtomicLong, AtomicBoolean, and AtomicReference

Part 295: Hardware-Level Synchronization: Compare-And-Swap (CAS) Mechanics

Part 296: High-Throughput Accumulators: LongAdder and LongAccumulator

Part 297: The java.util.concurrent Package: Overview and Architecture

Part 298: The ThreadLocal Class: Providing Per-Thread Independent Variables

Part 299: Preventing Memory Leaks with ThreadLocal.remove() in Thread Pools

Part 300: The Executor Framework: Decoupling Task Submission from Task Execution

Part 301: The Executor and ExecutorService Interfaces

Part 302: Creating Thread Pools with Executors: newFixedThreadPool and newCachedThreadPool

Part 303: Creating Single-Thread Pools and Work-Stealing Pools

Part 304: Deep Dive into ThreadPoolExecutor: Core Pool Size, Max Pool Size, and Keep-Alive

Part 305: Work Queue Types in Thread Pools: ArrayBlockingQueue, LinkedBlockingQueue, SynchronousQueue

Part 306: Handling Overloaded Pools: RejectedExecutionHandler Strategies

Part 307: Graceful Shutdown of Thread Pools: shutdown(), shutdownNow(), and awaitTermination()

Part 308: Returning Results with java.util.concurrent.Callable and Future

Part 309: Future Operations: get(), isDone(), and cancel()

Part 310: Asynchronous Programming with CompletableFuture (Java 8)

Part 311: Transforming Futures: thenApply(), thenAccept(), and thenRun()

Part 312: Composing and Combining Futures: thenCompose() and thenCombine()

Part 313: Aggregating Futures: CompletableFuture.allOf() and anyOf()

Part 314: Exception Handling in CompletableFuture: exceptionally() and handle()

Part 315: Explicit Locks: The java.util.concurrent.locks.Lock Interface

Part 316: ReentrantLock: Explicit Locking, Fair Locks, and Timed Lock Acquisition (tryLock)

Part 317: Read-Optimized Locking: ReentrantReadWriteLock

Part 318: Optimistic Locking with StampedLock (Java 8)

Part 319: Condition Variables: Condition Interface (await, signal, signalAll)

Part 320: Coordination Primitives: CountDownLatch for Barrier Synchronization

Part 321: Coordination Primitives: CyclicBarrier for Cyclic Synchronization

Part 322: Resource Throttling with Semaphore: Regulating Concurrent Access

Part 323: Thread Data Exchange with Exchanger

Part 324: Flexible Multi-Phase Coordination with Phaser

Part 325: Fork/Join Framework: Recursive Computation and Work-Stealing Algorithm

Part 326: Java Evolution: From Release Cadence to Modern Long-Term Support (LTS) Cycles

Part 327: Lambda Expressions: Syntax, Parameter Lists, and Expression Bodies

Part 328: Target Typing and Effectively Final Variables in Lambdas

Part 329: Built-in Functional Interfaces: Predicate<T> and Boolean Evaluations

Part 330: Built-in Functional Interfaces: Function<T, R> and Transformations

Part 331: Built-in Functional Interfaces: Consumer<T> and Side Effects

Part 332: Built-in Functional Interfaces: Supplier<T> and Lazy Value Generation

Part 333: Specialized Functional Interfaces: UnaryOperator, BinaryOperator, and Bi-Variants

Part 334: Method References: Reference to a Static Method (Class::staticMethod)

Part 335: Method References: Reference to an Instance Method of a Specific Object

Part 336: Method References: Reference to an Instance Method of an Arbitrary Object

Part 337: Constructor References: Instantiating Objects via ClassName::new

Part 338: Introduction to Stream API: Declarative Data Processing

Part 339: Streams vs Collections: In-Memory Storage vs Pipelined Computation

Part 340: Stream Lifecycle: Source, Intermediate Operations, and Terminal Operation

Part 341: Intermediate Operations: filter(), map(), and flatMap()

Part 342: Intermediate Operations: distinct(), sorted(), peek(), limit(), and skip()

Part 343: Terminal Operations: forEach(), count(), min(), max(), and collect()

Part 344: Terminal Operations: Matching (anyMatch, allMatch, noneMatch) and Searching

Part 345: Stream Reduction: The reduce() Operation for Custom Aggregations

Part 346: The Collectors Utility: toList(), toSet(), toMap(), and Unmodifiable Collections

Part 347: Advanced Grouping: Collectors.groupingBy() and Downstream Collectors

Part 348: Advanced Partitioning: Collectors.partitioningBy()

Part 349: Specialized Primitive Streams: IntStream, LongStream, and DoubleStream

Part 350: Parallel Streams: Leveraging Multi-Core Processors and Common ForkJoinPool

Part 351: Parallel Streams Pitfalls: Thread-Safety, Overhead, and When NOT to Use

Part 352: The java.util.Optional Class: Eliminating NullPointerException

Part 353: Optional Methods: of(), ofNullable(), empty(), isPresent(), and ifPresent()

Part 354: Optional Unwrapping: orElse(), orElseGet(), and orElseThrow()

Part 355: Transforming Optional: map(), flatMap(), and filter()

Part 356: Modern Date and Time API (Java 8 / java.time): Design and Immutability

Part 357: Working with Local Dates: LocalDate, LocalTime, and LocalDateTime

Part 358: Time Zones and Timestamps: ZonedDateTime, ZoneId, and Instant

Part 359: Measuring Time: Duration (Time-Based) vs Period (Date-Based)

Part 360: Formatting and Parsing Dates with DateTimeFormatter

Part 361: Java 9: Java Platform Module System (JPMS) and module-info.java

Part 362: Java 10: Local-Variable Type Inference with var

Part 363: Java 11: HTTP Client API Supporting HTTP/2 and WebSockets

Part 364: Virtual Threads (Project Loom, Java 21): Architecture and Mechanics

Part 365: Concurrency with Virtual Threads: Structured Concurrency and Scoped Values

Part 366: Detailed JVM Architecture: Subsystems and System Execution Flow

Part 367: ClassLoader Architecture: Bootstrap, Platform, and Application ClassLoaders

Part 368: Class Loading Lifecycle: Loading, Linking, and Initialization

Part 369: JVM Runtime Data Areas: Method Area / Metaspace vs Java Heap

Part 370: JVM Runtime Data Areas: JVM Stacks, PC Registers, and Native Stacks

Part 371: Java Heap Layout: Young Generation (Eden, S0, S1) and Old Generation

Part 372: Object Allocation in Eden, Minor GC, and Object Promotion

Part 373: Garbage Collection Roots: What Keeps an Object Alive in the JVM

Part 374: Garbage Collection Algorithms: Mark-Sweep, Mark-Sweep-Compact, and Copying

Part 375: Generational Garbage Collection Hypothesis

Part 376: HotSpot Garbage Collectors: Serial GC and Parallel (Throughput) GC

Part 377: HotSpot Garbage Collectors: Garbage-First (G1) Garbage Collector

Part 378: Ultra-Low Latency Garbage Collectors: ZGC and Shenandoah

Part 379: Essential JVM Tuning Options: Memory Sizing (-Xms, -Xmx, -Xss)

Part 380: Garbage Collector Selection and Tuning Flags

Part 381: Diagnosing Memory Leaks in Java: Static References and Listeners

Part 382: Analyzing Heap Dumps with Eclipse MAT (Memory Analyzer Tool)

Part 383: Command-Line Diagnostic Tools: jps, jstat, jcmd, jstack, and jmap

Part 384: Java Flight Recorder (JFR) and JDK Mission Control (JMC)

Part 385: Just-In-Time (JIT) Optimization: Method Inlining, Escape Analysis, Loop Unrolling

Part 386: Java Reflection API: Inspecting Classes, Methods, Fields at Runtime

Part 387: Accessing and Modifying Private Fields and Methods via Reflection

Part 388: Dynamic Proxies in Java: java.lang.reflect.Proxy and InvocationHandler

Part 389: Java Annotations Overview: Metadata in Source Code

Part 390: Standard Built-in Annotations: @Override, @Deprecated, @SuppressWarnings

Part 391: Meta-Annotations: @Target, @Retention, @Documented, and @Inherited

Part 392: Creating Custom Annotations and Processing Them at Runtime

Part 393: Creational Design Patterns: Singleton Pattern

Part 394: Creational Design Patterns: Factory Method and Abstract Factory

Part 395: Creational Design Patterns: Builder Pattern and Fluent APIs

Part 396: Structural Design Patterns: Adapter, Decorator, and Facade Patterns

Part 397: Structural Design Patterns: Proxy Pattern and Virtual Proxies

Part 398: Behavioral Design Patterns: Strategy Pattern with Java Lambdas

Part 399: Behavioral Design Patterns: Observer Pattern, Command Pattern, and Template Method

Part 400: Build Tools: Apache Maven vs Gradle Architecture

Part 401: Automated Testing: Unit Testing with JUnit 5 (Jupiter)

Part 402: Mocking Dependencies: Mockito Framework

Part 403: Database Connectivity (JDBC): DriverManager, Connection, PreparedStatement

Part 404: Connection Pooling with HikariCP and Transition to Spring Data JPA

Part 405: Enterprise Java Masterclass: Production Deployment, 12-Factor, and Security

Back to All Tutorials

Home
Tutorials
Java Full Tutorial
Test Part 1

Test Part 1

Part 1 Technology Updated September 13, 2026

Test

Content here

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

Follow us on:

Our objective is to cultivate a varied community of bloggers who can impart their distinct viewpoints and use words to positively influence others.

Home
FAQ
Feedback
Terms & Condition

Contact us with:

support@devifyblog.com (+91) 740-966-1917

Copyright @ All rights reserved.