Common Mistakes in Java Collections (and How to Avoid Them)
Avoid pitfalls in Java Collections! Discover common mistakes in Lists, Sets, Maps, and more—learn fixes, performance tips, and real-world examples
Tutorials under 'Java 8'
Migrating Legacy Code to Modern Java Collections
Learn how to refactor old Java code using outdated collections into modern, efficient, and safer collections with Java 8–21 features and best practices
Collections Interview Questions and Answers – From Basics to Deep Internals
Ace your Java interviews with this exhaustive guide to Java Collections – covering core concepts, internals, pitfalls, best practices, and real-world scenarios.
ArrayList in Java – Internals, Performance, and Best Practices
Learn how Java ArrayList works under the hood, explore its performance characteristics, best practices, and common pitfalls with code examples
Using Scanner and Regex to Parse String Input in Java – Robust, Flexible, and Efficient Techniques
Learn how to use Scanner and Regex in Java to parse string input efficiently. Covers tokens, delimiters, capture groups, edge cases, and best practices.
Building Custom Utility Functions for String Operations in Java – Patterns, Performance, and Clean Code
Learn how to build clean, reusable string utility functions in Java. Covers isBlank, toTitleCase, repeat, reverse, performance tips, and best practices
Comparing Performance of String Operations in Java – Benchmarks and Best Practices
Compare the performance of string operations in Java including StringBuilder, format, join, and more. Learn when to use what with benchmarks and examples.
Handling Null and Empty Strings in Java – Defensive Programming Techniques and Best Practices
Learn how to handle null and empty strings safely in Java using best practices, Java 11’s isBlank, Apache StringUtils, Optional, and more
Extracting and Replacing Substrings in Java – Complete Guide with Examples
Learn how to extract and replace substrings in Java using `substring()`, `replace()`, and `replaceAll()`. Covers regex, edge cases, and best practices.
Case Conversion and Character Manipulation in Java – Safe, Efficient, and Unicode-Aware
Learn how to convert cases and manipulate characters in Java Strings. Covers Unicode, performance tips, and best practices with code examples
Mastering Java String Joining with `String.join()` and `Collectors.joining()`
Learn how to efficiently join strings in Java using `String.join()` and `Collectors.joining()` with real-world examples, performance tips, and best practices
Efficient String Handling in Java: Performance Optimization Techniques
Learn efficient string handling techniques in Java to optimize performance. Explore StringBuilder, immutability, memory impact, and real-world practices.
Template Method Pattern in Java – Define the Skeleton of an Algorithm
Learn how the Template Method Pattern in Java helps define the skeleton of an algorithm and delegate specific steps to subclasses. Complete guide with examples.
Strategy Pattern in Java – Swap Algorithms at Runtime with Clean Design
Learn how to use the Strategy Pattern in Java to switch algorithms at runtime. Explore design, implementation, real-world examples, pros, and anti-patterns
State Pattern in Java – Manage Dynamic State Transitions with Elegance
Master the State Pattern in Java. Learn how to model dynamic behavior, switch states cleanly, and build maintainable systems using state transitions
Singleton Pattern in Java: Ensure a Single Instance Across Your App
Learn the Singleton Pattern in Java with real-world examples, code walkthroughs, best practices, anti-patterns, and modern implementation strategies