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## Posts

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- [Better Avoid Spring Boot Lazy-initialization @PostConstruct Trap](https://codingstrain.com/better-avoid-spring-boot-lazy-initialization-postconstruct-trap/) - Lazy-Initialization. How spring.main.lazy-initialization=true might break your app in ways you won't catch during testing.
- [How AI Coding Assistants Are Reshaping Software Engineering Careers](https://codingstrain.com/how-ai-coding-assistants-are-reshaping-software-engineering-careers/) - Lazy-Initialization. Are programmers coding themselves out of a job? The short answer is no. But programming as we know it is fundamentally restructuring.
- [How To Handle Large Datasets in Spring Boot](https://codingstrain.com/how-to-handle-large-datasets-with-spring-data-streams/) - Spring Data Streams. In this article, you will learn how do handle large query datasets in Spring Boot by making Spring Data return streams.
- [How to Reliably Implement Post-Commit Actions in Spring](https://codingstrain.com/how-to-reliably-implement-post-commit-actions-in-spring/) - Post-Commit Actions. In this article, you will learn how to reliably implement post-commit actions in Spring Boot, avoiding inconsistencies.
- [How to Log HTTP Incoming Requests in Spring Boot](https://codingstrain.com/how-to-log-http-incoming-requests-in-spring-boot/) - Post-Commit Actions. In this article, you will learn how to log incoming requests in Spring Boot, through some simple configuration steps.
- [How to Do a Breadth First Search for a Graph](https://codingstrain.com/how-to-do-a-breadth-first-search-for-a-graph/) - Breadth First Search. In this article, you will learn how to do a Breadth First Search for a graph, with an example in Java.
- [Brief and Easy Explanation of HATEOAS](https://codingstrain.com/brief-and-easy-explanation-of-hateoas/) - HATEOAS. Hypermedia as the Engine of Application State means the server returns not just data but hyperlinks that reveal what the client can do next.
- [Brief and Easy Explanation of Virtual Threads](https://codingstrain.com/brief-and-easy-explanation-of-virtual-threads/) - Virtual Threads. Use virtual threads to run 1 million concurrent tasks with plain blocking code, no thread pools, just simple scalability.
- [SOLID Principles Through Java Code Examples](https://codingstrain.com/solid-principles-through-java-code-examples/) - SOLID Principles. In this article, we will discuss SOLID Principles. We will use Java examples to clearly explain each of them.
- [Java Double: Parse String with Comma](https://codingstrain.com/java-double-parse-string-with-comma/) - Parsing strings into Double values can be tricky sometimes. We show in this post some common scenarios and how to deal with them.
- [Java Map: How to Get Sorted Keys](https://codingstrain.com/java-map-how-to-get-sorted-keys/) - The LinkedHashMap class implements the Map interface and preserves the order in which the keys are inserted into it.
- [How to Create a Deep or a Shallow Copy in Java](https://codingstrain.com/how-to-create-a-deep-or-a-shallow-copy-of-an-object-in-java/) - In this article, we will discuss the differences between a deep copy and and shallow copy of an object in Java, and their implications.
- [How to Implement Prim’s Algorithm for Minimum Spanning Tree](https://codingstrain.com/how-to-implement-prims-algorithm-for-minimum-spanning-tree/) - Prim’s Algorithm. In this article, you will learn how to Implement Prim’s Algorithm for Minimum Spanning Tree, with an example in Java based on backtracking.
- [How to Solve the N-Queen Problem](https://codingstrain.com/how-to-solve-the-n-queen-problem/) - N-Queen Problem. In this article, you will learn how to solve N-Queen problem, with an example in Java based on backtracking.
- [How to Solve the Matrix Chain Multiplication Problem](https://codingstrain.com/how-to-solve-the-matrix-chain-multiplication-problem/) - Matrix Chain Multiplication. In this article, you will learn how to solve theMatrix Chain Multiplication problem, with an example in Java.
- [How to Solve the Coin Change Problem](https://codingstrain.com/how-to-solve-the-coin-change-problem/) - Coin Change Problem. In this article, you will learn how to solve the coin change problem, with an example in Java.
- [How to Solve the Longest Common Subsequence Problem](https://codingstrain.com/how-to-solve-the-longest-common-subsequence-problem/) - Longest Common Subsequence. In this article, you will learn how to solve the longest common subsequence problem, with an example in Java.
- [How to Implement the Dijkstra's Algorithm](https://codingstrain.com/how-to-implement-the-dijkstras-algorithm/) - Dijkstra's Algorithm. In this article, you will learn how to implement the Dijkstra's Algorithm, with an example in Java.
- [How to Implement the Kruskal’s Algorithm](https://codingstrain.com/how-to-implement-the-kruskals-algorithm/) - Kruskal’s Algorithm. In this article, you will learn how to implement the Kruskal’s Algorithm, with an example in Java.
- [How to Do a Depth First Search for a Graph](https://codingstrain.com/how-to-do-a-depth-first-search-for-a-graph/) - Depth First Search. In this article, you will learn how to do a Depth First Search for a graph, with an example in Java.
- [How to Implement the Edit Distance Algorithm](https://codingstrain.com/how-to-implement-the-edit-distance-algorithm/) - Edit Distance. In this article, you will learn how to implement the Edit Distance Algorithm, with an example in Java.
- [Spring Cloud: How to Deal with Microservice Configuration (Part I)](https://codingstrain.com/spring-cloud-how-to-deal-with-microservice-configuration-part-i/) - Microservice Configuration. How to use Spring Cloud Config module to implement a minimal microservice scenario based on remote configuration (part I).
- [Spring Boot for Cloud - Actuator](https://codingstrain.com/spring-boot-for-cloud-actuator/) - An overview of Spring Boot framework features that are especially important in the context fo micro-service applications. In this article we discuss features useful in a production environment.
- [Spring Boot for Cloud - REST API Development](https://codingstrain.com/spring-boot-for-cloud-rest-api-development/) - An overview of Spring Boot framework features that are especially important in the context of Spring Cloud applications. In this article we discuss features related to API development.
- [Spring Boot for Cloud - Configuration and Dependencies](https://codingstrain.com/spring-boot-for-cloud-configuration-dependencies/) - Spring Boot. An overview of Spring Boot framework features that are especially important in the context of Spring Cloud applications.
- [A Brief Overview of the Spring Cloud Framework](https://codingstrain.com/spring-cloud-overview/) - A brief overview of the Spring Cloud framework, a list of its main packages and their relation with the Microservice Architectural patterns.
- [Spring Cloud: How to Deal with Microservice Configuration (Part II)](https://codingstrain.com/spring-cloud-how-to-deal-with-microservice-configuration-part-ii/) - Microservice Configuration.How to use Spring Cloud Config module to implement a minimal microservice scenario based on remote configuration (part II).
- [Spring Cloud: How to Implement Service Discovery (Part I)](https://codingstrain.com/spring-cloud-how-to-implement-service-discovery-part-i/) - Service Discovery.In this article, readers will learn how to configure and run some Service Discovery sample architectures by using the Spring Cloud components.
- [Spring Cloud: How to Implement Service Discovery (Part II)](https://codingstrain.com/spring-cloud-how-to-implement-service-discovery-part-ii/) - Service Discovery.In this article, readers will learn some additional topics on Spring Cloud Service Discovery and two different ways in which to combine Service Discovery and Remote Configuration.
- [REST Clients with OpenFeign: How to Implement Them](https://codingstrain.com/rest-clients-with-openfeign-how-to-implement-them/) - REST Clients with OpenFeign. In this article, readers will learn how to implement REST clients with the Spring Cloud OpenFeign module.
- [How to Implement a Gateway with Spring Cloud](https://codingstrain.com/how-to-implement-a-gateway-with-spring-cloud/) - gateway In this article, you will learn how to implement a gateway component for a micro-service system, by the Spring Cloud Gateway package.
- [How to Implement Client-Side Load Balancing With Spring Cloud](https://codingstrain.com/how-to-implement-client-side-load-balancing-with-spring-cloud/) - client-side load balancing. In this article, you will learn how to perform client-side load balancing by Spring Cloud Load Balancer.
- [How to Implement Circuit Breaker Pattern With Spring Cloud](https://codingstrain.com/how-to-implement-circuit-breaker-pattern-with-spring-cloud/) - Circuit breaker. In this article, you will learn how to implement a Circuit Breaker feature by Spring Cloud and Resilience4J.
- [How to Secure Spring Cloud Applications with SSL Protocol](https://codingstrain.com/how-to-secure-spring-cloud-applications-with-ssl-protocol/) - SSL protocol. In this article, you will learn how to secure micro-service systems by SSL, including disocvery and configuration servers.
- [How to Integrate OAuth2 in a Spring Cloud System](https://codingstrain.com/how-to-integrate-oauth2-in-a-spring-cloud-system/) - OAuth2. In this article, you will learn how to secure micro-service systems by OAuth2, using a Keycloak autorization and authentication server.
- [How to Implement Message-Driven Services with Spring Cloud Stream](https://codingstrain.com/how-to-implement-message-driven-services-with-spring-cloud-stream/) - Message-driven. In this article, you will learn how to implement message-driven micro-service systems with Spring Cloud Stream.
- [How to Implement Observability with Spring Cloud](https://codingstrain.com/how-to-implement-observability-with-spring-cloud/) - Observability. In this article, you will learn how to implement observabilty for micro-service systems with Micrometer and Micrometer Tracing.
- [How to Implement Contract Tests with Pact](https://codingstrain.com/how-to-implement-contract-tests-with-pact/) - Pact. In this article, you will learn how to implement contract testing for micro-service systems with Spring-enabled Pact libraries.
- [Spring Cloud Contract: How to Implement Contract Tests](https://codingstrain.com/how-to-implement-contract-tests-with-spring-cloud-contract/) - Spring Cloud Contract. In this article, you will learn how to implement contract testing for micro-service systems with Spring Cloud Contract.
- [How to Find the Longest Repeating Subsequence in a String](https://codingstrain.com/how-to-find-the-longest-repeating-subsequence-in-a-string/) - Longest Repeating Subsequence. In this article, you will learn how to implement an algorithm to find the longest repeating subsequence in a string, with an example in Java.
- [How to Count Number of Distinct Substrings in a String](https://codingstrain.com/how-to-count-number-of-distinct-substrings-in-a-string/) - Number of Distinct Substrings. In this article, you will learn how to implement an algorithm to count the number of distinct dubstrings in a String, with an example in Java.
- [How to Implement the KMP (Knuth-Morris-Pratt) Algorithm](https://codingstrain.com/how-to-implement-the-kmp-knuth-morris-pratt-algorithm/) - KMP (Knuth-Morris-Pratt). In this article, you will learn how to implement the KMP (Knuth-Morris-Pratt) algorithm, with an example in Java.
- [How to Determine Maximum width of a Binary Tree](https://codingstrain.com/how-to-determine-maximum-width-of-a-binary-tree/) - Maximum width of a Binary Tree. In this article, you will learn how to determine the maximum width of a binary tree, with an example in Java.
- [How to Determine if Two Binary Trees are Identical](https://codingstrain.com/how-to-determine-if-two-binary-trees-are-identical/) - Determine if Two Binary Trees are Identical. We will learn how to determine if two binary trees are Identical, with an example in Java.
- [How to Survive Microservices Horror](https://codingstrain.com/how-to-survive-microservices-horror/) - Microservices Horror. In this article you will learn how to survive several disastrous scenarios in microservices implementations.
- [How to Convert Binary Tree to Doubly Linked List](https://codingstrain.com/how-to-convert-binary-tree-to-doubly-linked-list/) - Level Order Traversal. In this article you will learn how to convert a binary tree to doubly linked list in Java.
- [How to Perform Inorder, Non-Recursive Traversal of a Binary Tree](https://codingstrain.com/how-to-perform-inorder-non-recursive-traversal-of-a-binary-tree/) - Non-Recursive Traversal. In this article you will learn how to implement inorder, non-recursive traversal of a binary tree
- [How to Determine If a Binary Tree Is a Valid BST in Java](https://codingstrain.com/how-to-determine-if-a-binary-tree-is-a-valid-bst-in-java/) - Valid BST. In this article you will learn how to determine If a binary tree Is a valid BST in Java.
- [How to Implement Level Order Traversal in a Binary Tree](https://codingstrain.com/how-to-implement-level-order-traversal-in-a-binary-tree/) - Level Order Traversal. In this article you will learn how to implement the Level Order Traversal of a Binary Tree in Java.
- [An Easy to Grasp Explanation of the Tree Data Structure](https://codingstrain.com/an-easy-to-grasp-explanation-of-the-tree-data-structure/) - Tree. In this article you will learn the basics of the Tree Data Structure, and its basic types, such as Binary Search and AVL trees.
- [Serialize and Deserialize a Binary Tree: Easy Explanation](https://codingstrain.com/serialize-and-deserialize-a-binary-tree-easy-explanation/) - Serialize and Deserialize a Binary Tree. In this article you will learn how Serialize and Deserialize a Binary Tree with examples in Java.
- [Binary Tree's Diameter: Easy Explanation to Find its value](https://codingstrain.com/binary-trees-diameter-easy-explanation-to-find-its-value/) - Binary Tree's Diameter. In this article you will learn how find the diameter of a Binary Tree with an example algorithm in Java.
- [An Easy Explanation of the AVL Tree Data Structure](https://codingstrain.com/an-easy-explanation-of-the-avl-tree-data-structure/) - AVL Tree. In this article you will learn about AVL binary search trees and how to implement the related balancing algorithm in Java.
- [How to Implement the Lowest Common Ancestor in a Binary Tree Algorithm](https://codingstrain.com/how-to-implement-the-lowest-common-ancestor-in-a-binary-tree-algorithm/) - Lowest Common Ancestor. In this article you will learn how to implement the Lowest Common Ancestor in a Binary Tree algorithm in Java, and for what scenarios is effective.
- [How to Implement the Bucket Sort Algorithm](https://codingstrain.com/how-to-implement-the-bucket-sort-algorithm/) - Bucket Sort. In this article you will learn how to implement the Bucket Sort algorithm in Java, and for what scenarios is effective.
- [How to Implement the Shell Sort Algorithm](https://codingstrain.com/how-to-implement-the-shell-sort-algorithm/) - Shell Sort. In this article you will learn how to implement the Shell Sort algorithm in Java, and for what scenarios is effective.
- [How to Implement the Insertion Sort Algorithm](https://codingstrain.com/how-to-implement-the-insertion-sort-algorithm/) - Insertion Sort. In this article you will learn how to implement the Insertion Sort algorithm in Java, and for what scenarios is effective.
- [How to Implement the Counting Sort Algorithm](https://codingstrain.com/how-to-implement-the-counting-sort-algorithm/) - Counting Sort. In this article you will learn how to implement the Counting Sort algorithm in Java, and for what scenarios is effective.
- [How to Implement the Bubble Sort Algorithm](https://codingstrain.com/how-to-implement-the-bubble-sort-algorithm/) - Bubble Sort. In this article you will learn how to implement the Bubble Sort algorithm in Java, and for what scenarios is effective.
- [How to Implement the Radix Sort Algorithm](https://codingstrain.com/how-to-implement-the-radix-sort-algorithm/) - Radix Sort. In this article you will learn how to implement the Radix Sort algorithm in Java, and for what scenarios is effective.
- [How to Reverse a String](https://codingstrain.com/how-to-reverse-a-string/) - In this article, we will discuss how to reverse a String in Java, using two different approaches, improving the space efficiency in the second solution.
- [How to Reverse a String Keeping Special Characters in Place](https://codingstrain.com/how-to-reverse-a-string-keeping-special-characters/) - keeping special characters In this article, we will discuss how to reverse a String containing special characters in Java, keeping the their original positions.
- [How to Find the Missing Number From an Array of Integers](https://codingstrain.com/find-missing-number-from-suquence-of_integers/) - find the missing number In this article, the readers will learn two possible ways of finding the missing numbers from a set of n-1 numbers taken from a 1-n sequence.
- [How to Do a Binary Search on a Sorted Array](https://codingstrain.com/how-to-do-a-binary-search-on-a-sorted-array/) - binary search In this article, the readers will learn two possible ways of finding the missing numbers from a set of n-1 numbers taken from a 1-n sequence.
- [How to Get All Permutations of a String](https://codingstrain.com/how-to-get-all-permutations-of-a-string/) - permutations of a string In this article, the readers will learn how to find all the permutations of a given string of characters.
- [How to Solve the 0/1 Knapsack Problem](https://codingstrain.com/how-to-solve-the-0-1-knapsack-problem/) - 0/1 knapsack problem In this article, the readers will learn how to solve the 0/1 knapsack problem, by a dynamic algorithm.
- [Quick-Sort Algorithm: How to Sort an Array](https://codingstrain.com/quick-sort-algorithm-how-to-sort-an-array/) - quick-sort algorithm In this article, the readers will learn how to sort an array of integers using the quick.sort algorithm
- [How to Solve the Fractional Knapsack Problem](https://codingstrain.com/how-to-solve-the-fractional-knapsack-problem/) - fractional knapsack problem In this article, the readers will learn how to solve the fractional knapsack problem, by a greedy algorithm.
- [How to Check if a Number is Sparse](https://codingstrain.com/how-to-check-if-a-number-is-sparse/) - check if a number is sparse In this article, the readers will learn how to check if an integer number is sparse.
- [Nth Smallest Element in an Unsorted Array](https://codingstrain.com/nth-smallest-element-in-an-unsorted-array/) - Nth Smallest Element. In this article you will learn severale ways of solving the "Finding the Nth smallest element in an unsorted array" problem.
- [How to Implement the QuickSelect Algorithm](https://codingstrain.com/how-to-implement-the-quickselect-algorithm/) - QuickSelect. In this article you will learn how to implement the QuickSelect algorithm in Java.
- [How to Implement the Merge Sort Algorithm](https://codingstrain.com/how-to-implement-the-merge-sort-algorithm/) - Merge Sort. In this article you will learn how to implement the Merge Sort algorithm in Java.
- [How to Implement the Heap Sort Algorithm](https://codingstrain.com/how-to-implement-the-heap-sort-algorithm/) - Heap Sort. In this article you will learn how to implement the Heap Sort algorithm in Java, and for what scenarios is effective.
- [How to  Set Custom Colors with Apache POI-HSSF](https://codingstrain.com/how-to-set-custom-colors-with-apache-poi-hssf/) - Apache POI-HSSF. In this article, the readers will learn how set custom background Excel cell colors with Apache POI-HSSF.
- [Java Map: How to Preserve Insertion Order](https://codingstrain.com/java-map-preserve-insertion-order/) - The LinkedHashMap class implements the Map interface and preserves the order in which the keys are inserted into it.
- [How to Better Understand Java HashMap](https://codingstrain.com/how-to-better-understand-java-hashmap/) - Java HashMap. How the HashMap class is internally implemented, its initial capacity and re-sizing and its behavior in a multi-threaded scenario.
- [A Quick Explanation of The Java Decorator Pattern](https://codingstrain.com/quick-explanation-of-the-java-decorator-pattern/) - A brief overview of the Java Decorator Pattern, a design clever gimmick used to extend existing software in a dynamic way.
- [Java Observer Pattern with Spring and AOP](https://codingstrain.com/java-observer-pattern-spring-aop-and-a-custom-annotation/) - The Java Observer Pattern is among the most famous design patterns, aimed at handling communication of state changes between objects.

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