Immutability in Java ensures objects cannot be modified after creation, providing benefits like thread safety, caching optimization, and security. The article covers String immutability mechanics, memory management with String Constant Pool, and demonstrates how to create immutable classes using defensive copying, final fields, and proper constructor design. It explores modern approaches like Records, sealed classes, and builder patterns, while addressing common pitfalls like shallow copying and the difference between unmodifiable and truly immutable collections.
Table of contents
Immutability in JavaWhat is Immutability?The String Immutability Deep DiveWhy String Immutability Matters: Four Critical ReasonsHow do you create an immutable class?Best Practices and Advanced PatternsFrequently Asked QuestionsPerformance ConsiderationsCommon Pitfalls and How to Avoid ThemConclusionSort: