Filtering and Transforming Collections in Guava
1. Overview In this tutorial, we’ll illustrate how to filter and transform collections with Guava. We will filter using Predicates, transform using the Functions that the library […]
JAVA
Introduction to PCollections
1. Overview In this article, we will be looking at PCollections, a Java library providing persistent, immutable collections. Persistent data structures (collections) can’t be modified directly during the […]
Introduction to Eclipse Collections
1. Overview Eclipse Collections is another improved collection framework for Java. Simply put, it provides optimized implementations as well as some additional data structures and features […]
Guide to Guava Table
1. Overview In this tutorial, we’ll show how to use the Google Guava’s Table interface and its multiple implementations. Guava’s Table is a collection that represents a table like […]
Guava – Join and Split Collections
1. Overview In this tutorial, we will learn how to use the Joiner and Splitter in the Guava library. We’ll convert collections into a String with the Joiner and we’ll split a […]
Guide to Guava Multimap
1. Overview In this article, we will look at one of Map implementations from Google Guava library – Multimap. It is a collection that maps keys to values, […]
Guava Collections Cookbook
1. Introduction This cookbook article is organized into small and focused recipes and code snippets for using Guava style collections. The format is that of a growing list […]
Guide to Apache Commons CircularFifoQueue
1. Overview In this quick tutorial, we’ll have a look at the CircularFifoQueue data structure provided in the collections4.queue package of the Apache Commons Collections library. CircularFifoQueue<E> implements the Queue<E> interface and […]
Apache Commons Collections MapUtils
1. Introduction MapUtils is one of the tools available in the Apache Commons Collections project. Simply put, it provides utility methods and decorators to work with java.util.Map and java.util.SortedMap instances. […]
A Guide to Apache Commons Collections CollectionUtils
1. Overview Simply put, the Apache CollectionUtils provides utility methods for common operations which cover a wide range of use cases and helps in avoiding writing boilerplate code. […]
Apache Commons Collections BidiMap
1. Overview In this short article, we’ll be looking at an interesting data structure in the Apache Commons Collections library – the BidiMap. The BidiMap adds a possibility […]
Apache Commons Collections OrderedMap
1. Overview The Apache Commons Collections library provides useful classes that complement the Java Collections Framework. In this article, we will review the interface OrderedMap, which extends java.util.Map. 2. […]
Apache Commons Collections SetUtils
1. Overview In this article, we’ll be exploring the SetUtils API of Apache Commons Collections library. Simply put, these utilities can be used to execute certain operations […]
Apache Commons Collections Bag
1. Introduction In this quick article, we’ll focus on how to use the Apache’s Bag collection. 2. Maven Dependency Before we start, we need to import the […]
Removing Elements from Java Collections
1. Overview In this quick tutorial, we’re going to talk about four different ways to remove items from Java Collections that match certain predicates. We’ll naturally also look […]
Getting the Size of an Iterable in Java
1. Overview In this quick tutorial, we’ll learn about the various ways in which we can get the size of an Iterable in Java. 2. Iterable and […]
A Guide to Iterator in Java
1. Introduction An Iterator is one of many ways we can traverse a collection, and as every option, it has its pros and cons. It was first […]
Java Collections Interview Questions
1. Introduction Java Collections is a topic often brought up on technical interviews for Java developers. This article reviews some important questions that are asked […]
Java Convenience Factory Methods for Collections
1. Overview Java 9 brings the long-awaited syntactic sugar for creating small unmodifiable Collection instances using a concise code one-liner. As per JEP 269, new convenience factory methods […]
Collect a Java Stream to an Immutable Collection
1. Introduction We often wish to convert a Java Stream into a collection. This usually results in a mutable collection, but we can customize it. In this […]
