How to Collect Entity IDs from Java Collections

In many applications, we often work with collections of domain entities retrieved from a database, API, or in-memory source, and…

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Assert Collection of JSON Objects Ignoring Order Example

1. Introduction JavaScript Object Notation (JSON) is a text-based format for storing and transporting data. In this example, I will…

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Queue to List Conversion in Java

Queues and Lists are fundamental data structures in Java. The Java’s Queue interface represents a collection designed for holding elements…

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Handle Null Values In ArrayList.addAll()

The ArrayList class in Java is a commonly used data structure. One of its methods, addAll(), allows us to add…

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Java Arrays Sort decoded

Sorting is one the first algorithm that we learn in computer science. Sorting is such an interesting area that it…

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9 differences between Array and ArrayList in Java

Both array and ArrayList are two important data structures in Java and are frequently used in Java programs. Even though…

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10 Examples of using ArrayList in Java – Tutorial

ArrayList in Java is the most frequently used collection class after HashMap. Java ArrayList represents an automatic re-sizeable array and used…

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Leaner Java Collections with FastUtil

In response to my recent post Discovering a Trove of Java Primitives Collection Handling on the GNU Trove library, TheAlchemist…

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An introduction to optimising a hashing strategy

Overview The strategy that’s used for hashing keys, can have a direct impact on the performance of a hashed collections…

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