programming Archives - Web Rewrite Technology Blog Where You Find Programming Tips and Tricks Fri, 18 Sep 2026 06:28:32 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.7 Why parallelStream() Can Make Java Code Slower https://webrewrite.com/why-parallelstream-can-make-java-code-slower/ Fri, 18 Sep 2026 06:28:32 +0000 https://webrewrite.com/?p=4618 One of the easiest ways to make Java code run in parallel is to replace: with: For example: can be changed to: At first glance,…

The post Why parallelStream() Can Make Java Code Slower appeared first on Web Rewrite.

]]> Internal working of HashMap in Java 8 & Beyond https://webrewrite.com/internal-working-of-hashmap-in-java-8-beyond/ https://webrewrite.com/internal-working-of-hashmap-in-java-8-beyond/#disqus_thread Sat, 03 May 2025 07:59:03 +0000 https://webrewrite.com/?p=4045 How HashMap internally works in java is the most asked interview question. Even with just 1–2 years of experience, you’ve likely used HashMap in your…

The post Internal working of HashMap in Java 8 & Beyond appeared first on Web Rewrite.

]]> https://webrewrite.com/internal-working-of-hashmap-in-java-8-beyond/feed/ 0 Blocking Queue Implementation in Java https://webrewrite.com/blocking-queue-implementation-in-java/ Tue, 22 Apr 2025 02:45:46 +0000 https://webrewrite.com/?p=4568 In this blog, I am going to explain how to implement a thread-safe, blocking queue in Java using low-level concurrency primitives like wait(), notify() and…

The post Blocking Queue Implementation in Java appeared first on Web Rewrite.

]]> Race Condition in Java: Causes, Examples, and Solutions https://webrewrite.com/race-condition-in-java-causes-examples-and-solutions/ Sun, 30 Mar 2025 07:35:43 +0000 https://webrewrite.com/?p=4543 In this article, I am going to explain what is Race condition? Where Race condition are not a concern in java code and different ways…

The post Race Condition in Java: Causes, Examples, and Solutions appeared first on Web Rewrite.

]]> Dependency Inversion Principle in Java https://webrewrite.com/dependency-inversion-principle/ Fri, 28 Mar 2025 15:08:55 +0000 https://webrewrite.com/?p=4530 In this blog post, I am going to explain what is dependency inversion principle, why is it important and how to implement dependency inversion principle…

The post Dependency Inversion Principle in Java appeared first on Web Rewrite.

]]> Liskov Substitution Principle | SOLID Principles https://webrewrite.com/liskov-substitution-principle-solid-principles/ https://webrewrite.com/liskov-substitution-principle-solid-principles/#disqus_thread Sun, 23 Mar 2025 07:00:11 +0000 https://webrewrite.com/?p=4366 In this post, I am going to discuss the third design principle of SOLID, which is the Liskov Substitution Principle. The SOLID principles are a…

The post Liskov Substitution Principle | SOLID Principles appeared first on Web Rewrite.

]]> https://webrewrite.com/liskov-substitution-principle-solid-principles/feed/ 0 Wrapper Classes in Java https://webrewrite.com/wrapper-classes-in-java/ https://webrewrite.com/wrapper-classes-in-java/#disqus_thread Sat, 19 Mar 2022 17:33:09 +0000 https://webrewrite.com/?p=4324 In this tutorial, I am going to explain what are wrapper classes in java. Why it is introduced and the concept of autoboxing and unboxing.…

The post Wrapper Classes in Java appeared first on Web Rewrite.

]]> https://webrewrite.com/wrapper-classes-in-java/feed/ 0 Binary Tree Postorder Traversal without Recursion https://webrewrite.com/binary-tree-postorder-traversal-without-recursion/ https://webrewrite.com/binary-tree-postorder-traversal-without-recursion/#disqus_thread Thu, 17 Mar 2022 01:52:59 +0000 https://webrewrite.com/?p=3935  In this tutorial, I am going to discuss binary tree postorder traversal. How to implement binary tree postorder traversal with and without recursion. Given the root…

The post Binary Tree Postorder Traversal without Recursion appeared first on Web Rewrite.

]]> https://webrewrite.com/binary-tree-postorder-traversal-without-recursion/feed/ 0