Blog Posts

2026¹

February¹

Day 99: Virtual Threads Didn’t Kill Event Loops. Here’s How Each Works

February 13, 2026 · 20 min

2025¹⁴

December³

Day 98: I Thought Virtual Threads Were Just Green Threads—They’re Actually Continuations on the Heap

December 23, 2025 · 9 min

Day 97: Java Concurrency Toolkit Part 3 - Advanced Patterns & Production Readiness

December 22, 2025 · 26 min

Day 96: Java Concurrency Toolkit Part 2 - Core Synchronization Patterns

December 10, 2025 · 16 min

November¹

Day 95: Java Concurrency Toolkit Part 1 - Foundation & Execution Patterns

November 21, 2025 · 25 min

October²

Day 94: Nobody Told Me Java Application Could Start This Fast and The Rabbit hole I explored

October 30, 2025 · 14 min

Day 93: Stop Leaking Passwords - Building Java’s Answer to PHP’s #[SensitiveParameter]

October 7, 2025 · 20 min

September¹

Day 92: Building AI Agents with Java 21 and Spring AI - My Learning from the Workshop

September 10, 2025 · 12 min

August¹

Day 91: The Art of Reading Massive Files Without Breaking a Sweat - Memory Mapping in Java 21

August 15, 2025 · 11 min

July¹

Day 90: How I Built a Secret Agent That Infiltrates Any Java Application

July 18, 2025 · 8 min

June¹

Day 89: When Your Singleton Isn’t Really a Singleton (And How to Fix It)

June 26, 2025 · 10 min

April¹

Day 88: Multilingual Audio Transcription with Gemini 1.5, Vertex AI, and Spring Boot

April 29, 2025 · 7 min

March²

Day 87: Java’s Environment Variable Paradox: Easy to Read, Impossible to Change?

March 26, 2025 · 8 min

Day 86: Building a Secure Java Sandbox with Custom Class Loaders, Process isolation and Java Platform Module System – Executing JAR and .java Files Safely

March 12, 2025 · 5 min

January¹

Day 85: Idempotent APIs in Java: Concepts, Implementation Strategies, and a Spring Boot File Upload Implementation

January 2, 2025 · 5 min

2024¹⁰

October¹

Day 84: Hot Class Reload in Java – A Webpack HMR-like Experience for Java Developers

October 4, 2024 · 13 min

September¹

Day 83: Java Object Cloning: Exploring Shallow and Deep Copy Techniques

September 14, 2024 · 13 min

August¹

Day 82: Reflection in Java: Building a Simple DI Container in 100 Lines of Code

August 17, 2024 · 16 min

July¹

Day 81: Creating custom stream operations ex: Slide, Shift, Zip and Fold using Spliterator

July 4, 2024 · 6 min

May²

Day 80: From Concept to Code: Implementing a Dummy Consistent Hashing in Java using TreeMap

May 23, 2024 · 12 min

Day 79: Did you know that too much print statement can cost you money

May 3, 2024 · 6 min

April¹

Day 78: Java 22 - Embracing Safe Memory Allocation Using FFM API - An alternative to Unsafe API

April 18, 2024 · 4 min

March¹

Day 77: Explore Something Unsafe : Crafting a Memory allocator using Java Unsafe API

March 14, 2024 · 5 min

January²

Day 76: Implementing a dummy Service Oriented Architecture (SOA) service to Understand Java Service Provider Interface (SPI)

January 26, 2024 · 6 min

Day 75: Java BufferedReader: Do We Know Why We Need To Close It?

January 2, 2024 · 9 min

2023¹⁰

December¹

Day 74: Java Security: Crafting a toy TLS Server with Java Security API

December 12, 2023 · 8 min

September¹

Day 73: Java Security: Safeguarding Data with Encryption and Keys

September 11, 2023 · 6 min

July¹

Day 72: Can a HashMap Take Null or Empty String as a Key in Java?

July 26, 2023 · 4 min

June¹

Day 71: Understanding Heap poullion in java and its causes and how to prevent it

June 9, 2023 · 5 min

April²

Day 70:Diving deep into Array copy- Measuring Array Copy Performance in Java with JMH: A Comparative Analysis of Methods

April 15, 2023 · 3 min

Day 69 : Unlocking Java Performance Secrets: Harnessing the Power of JMH Microbenchmarking

April 5, 2023 · 5 min

March¹

Day 68 : Becoming a memory plumber; A tale of Memory Leak and how to find them ( part 3)

March 30, 2023 · 5 min

January³

Day 67: Becoming a memory plumber; A tale of Memory Leak and how to find them ( part 2)

January 21, 2023 · 9 min

Day 66: Becoming a memory plumber; A tale of Memory Leak and how to find them ( part 1)

January 20, 2023 · 6 min

Day 65: A tale of RMI (Remote Method Invocation) in java

January 12, 2023 · 9 min

2022³⁰

December²

Day 64: Implementing a basic Bloom Filter Using Java BitSet api

December 28, 2022 · 8 min

Day 63: Alert system for Java OutOfMemory Error

December 14, 2022 · 6 min

November⁴

Day 62: Understanding JMX and its architecture ( Agent Level )

November 29, 2022 · 9 min

Day 61: Understanding JMX and its architecture (Management Level)

November 15, 2022 · 5 min

Day 60: Generating JVM heap dump programmatically

November 11, 2022 · 4 min

Day 59: Understanding Proxy and Dynamic Proxy in Java

November 4, 2022 · 7 min

October⁴

Day 58: Mocking void methods using ArgumentCapture and Answering

October 23, 2022 · 4 min

Day 57: All about Random in Java ( Random, SecureRandom,ThreadLocalRandom and SplittableRandom)

October 13, 2022 · 9 min

Day 56: Zero length Array and Its use

October 6, 2022 · 3 min

Blue-Green Deployment using DNS

October 3, 2022 · 8 min

September³

Day 55: Understanding static and instance initializer in java classes and

September 26, 2022 · 3 min

Git troubleshooting : 6 helpful command with explanations

September 15, 2022 · 2 min

Day 54: Understanding volatile keyword’s use for Multi Threaded program

September 1, 2022 · 4 min

August¹

Day 53: Processing Http Request Asynchronously using CompletableFutures

August 17, 2022 · 3 min

July¹

Day 52: Async Processing HttpRequest’s using ExecutorCompletionService

July 26, 2022 · 4 min

May³

Day 51: Creating Stream (using StreamSupport API) from Spliterator by converting Iterator to Spliterator

May 28, 2022 · 3 min

Day 50: Marker interface and it’s uses

May 21, 2022 · 4 min

Day 49: A utility class for Zip and Unzip files using java FileSystem api (Part 2)

May 6, 2022 · 4 min

April¹

Day 48: A utility class for Zip and Unzip files using java Zip api (Part 1)

April 11, 2022 · 7 min

March³

Day 47: ThreadMXBean to get information about thread’s status, deadlock monitoring and cpu time that the thread got etc.

March 28, 2022 · 2 min

Day 46: Writing a generic and thread safe ObjectPool to enable pooling for any type of class

March 16, 2022 · 3 min

Day 45: learning about the internals of JVM and JRE (part 3)

March 1, 2022 · 6 min

February⁴

Day 44: learning about the internals of JRE and JVM (Part 2)

February 24, 2022 · 8 min

Day 43: learning about the internals of jre, jvm (Part 1)

February 14, 2022 · 4 min

Day 42: using custom annotations and check if its a class level or field level annotation

February 11, 2022 · 2 min

Day 41: Generating unique id’s based on device MAC address and epoch time

February 3, 2022 · 4 min

January⁴

Day 40: Generator implementation using custom Iterator and Threads.

January 27, 2022 · 1 min

Day 39: Local date time to UTC date time and vice versa with respect to timezone and Day light saving

January 21, 2022 · 3 min

Day 37: Feature toggle to enable disable features for paid and unpaid user

January 5, 2022 · 1 min

Day 38: One of the cases to use check and unchecked exceptions

January 5, 2022 · 2 min

2021⁵

December⁴

Day 36: Learned about banned dependencies and how to ban transitive dependency in a maven or gradle project

December 14, 2021 · 2 min

Day 35: Emulating Pair in java using AbstractMap.SimpleEntry<>() and new Object() {} implementation

December 6, 2021 · 1 min

Advent of Code Day 02

December 2, 2021 · 1 min

Advent of Code Day 01

December 1, 2021 · 1 min

September¹

Day 26: Writing a method to retry another method execution

September 30, 2021 · 2 min

2026 1

February 1

Day 99: Virtual Threads Didn’t Kill Event Loops. Here’s How Each Works

2025 14

December 3

Day 98: I Thought Virtual Threads Were Just Green Threads—They’re Actually Continuations on the Heap

Day 97: Java Concurrency Toolkit Part 3 - Advanced Patterns & Production Readiness

Day 96: Java Concurrency Toolkit Part 2 - Core Synchronization Patterns

November 1

Day 95: Java Concurrency Toolkit Part 1 - Foundation & Execution Patterns

October 2

Day 94: Nobody Told Me Java Application Could Start This Fast and The Rabbit hole I explored

Day 93: Stop Leaking Passwords - Building Java’s Answer to PHP’s #[SensitiveParameter]

September 1

Day 92: Building AI Agents with Java 21 and Spring AI - My Learning from the Workshop

August 1

Day 91: The Art of Reading Massive Files Without Breaking a Sweat - Memory Mapping in Java 21

July 1

Day 90: How I Built a Secret Agent That Infiltrates Any Java Application

June 1

Day 89: When Your Singleton Isn’t Really a Singleton (And How to Fix It)

April 1

Day 88: Multilingual Audio Transcription with Gemini 1.5, Vertex AI, and Spring Boot

March 2

Day 87: Java’s Environment Variable Paradox: Easy to Read, Impossible to Change?

Day 86: Building a Secure Java Sandbox with Custom Class Loaders, Process isolation and Java Platform Module System – Executing JAR and .java Files Safely

January 1

Day 85: Idempotent APIs in Java: Concepts, Implementation Strategies, and a Spring Boot File Upload Implementation

2024 10

October 1

Day 84: Hot Class Reload in Java – A Webpack HMR-like Experience for Java Developers

September 1

Day 83: Java Object Cloning: Exploring Shallow and Deep Copy Techniques

August 1

Day 82: Reflection in Java: Building a Simple DI Container in 100 Lines of Code

July 1

Day 81: Creating custom stream operations ex: Slide, Shift, Zip and Fold using Spliterator

May 2

Day 80: From Concept to Code: Implementing a Dummy Consistent Hashing in Java using TreeMap

Day 79: Did you know that too much print statement can cost you money

April 1

Day 78: Java 22 - Embracing Safe Memory Allocation Using FFM API - An alternative to Unsafe API

March 1

Day 77: Explore Something Unsafe : Crafting a Memory allocator using Java Unsafe API

January 2

Day 76: Implementing a dummy Service Oriented Architecture (SOA) service to Understand Java Service Provider Interface (SPI)

Day 75: Java BufferedReader: Do We Know Why We Need To Close It?

2023 10

December 1

Day 74: Java Security: Crafting a toy TLS Server with Java Security API

September 1

Day 73: Java Security: Safeguarding Data with Encryption and Keys

July 1

Day 72: Can a HashMap Take Null or Empty String as a Key in Java?

June 1

Day 71: Understanding Heap poullion in java and its causes and how to prevent it

April 2

Day 70:Diving deep into Array copy- Measuring Array Copy Performance in Java with JMH: A Comparative Analysis of Methods

Day 69 : Unlocking Java Performance Secrets: Harnessing the Power of JMH Microbenchmarking

March 1

Day 68 : Becoming a memory plumber; A tale of Memory Leak and how to find them ( part 3)

January 3

Day 67: Becoming a memory plumber; A tale of Memory Leak and how to find them ( part 2)

Day 66: Becoming a memory plumber; A tale of Memory Leak and how to find them ( part 1)

Day 65: A tale of RMI (Remote Method Invocation) in java

2022 30

December 2

Day 64: Implementing a basic Bloom Filter Using Java BitSet api

Day 63: Alert system for Java OutOfMemory Error

November 4

Day 62: Understanding JMX and its architecture ( Agent Level )

Day 61: Understanding JMX and its architecture (Management Level)

Day 60: Generating JVM heap dump programmatically

Day 59: Understanding Proxy and Dynamic Proxy in Java

October 4

Day 58: Mocking void methods using ArgumentCapture and Answering

Day 57: All about Random in Java ( Random, SecureRandom,ThreadLocalRandom and SplittableRandom)

Day 56: Zero length Array and Its use

Blue-Green Deployment using DNS

September 3

2026¹

February¹

2025¹⁴

December³

November¹

October²

September¹

August¹

July¹

June¹

April¹

March²

January¹

2024¹⁰

October¹

September¹

August¹

July¹

May²

April¹

March¹

January²

2023¹⁰

December¹

September¹

July¹

June¹

April²

March¹

January³

2022³⁰

December²

November⁴

October⁴

September³

August¹

July¹

May³

April¹

March³

February⁴

January⁴

2021⁵

December⁴

September¹