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 […]
Java
Java – Combine Multiple Collections
1. Overview In this tutorial, we will illustrate how to concatenate multiple collections into one logical collection. We’ll be exploring five different approaches – two […]
Join and Split Arrays and Collections in Java
1. Overview In this quick tutorial, we’ll learn how to join and to split Arrays and Collections in Java, making good use of the new stream support. 2. Join […]
Zipping Collections in Java
1. Introduction In this tutorial, we’ll illustrate how to zip two collections into one logical collection. The “zip” operation is slightly different from the standard “concat” […]
Flattening Nested Collections in Java
1. Overview In this quick article, we’ll explore how to flatten a nested collection in Java. 2. Example of a Nested Collection Suppose we have […]
Shuffling Collections In Java
1. Overview In this quick article, we’ll see how we can shuffle a collection in Java. Java has a built-in method for shuffling List objects — we’ll utilize […]
Sorting in Java
1. Overview This article will illustrate how to apply sorting to Array, List, Set and Map in Java 7 and Java 8. 2. Sorting With Array Let’s start by sorting integer arrays […]
Map to String Conversion in Java
1. Overview In this tutorial, we’ll focus on conversion from a Map to a String and the other way around. First, we’ll see how to achieve these using core […]
How to Convert List to Map in Java
1. Overview Converting List to Map is a common task. In this tutorial, we’ll cover several ways to do this. We’ll assume that each element of the List has an identifier that […]
Convert a Map to an Array, List or Set in Java
1. Overview This short article will show how to convert the values of a Map to an Array, a List or a Set using plain Java as well as a quick Guava based example. 2. Map […]
Converting Between a List and a Set in Java
1. Overview In this quick tutorial, we’ll take a look at the conversion between a List and a Set, starting with Plain Java, using Guava and the Apache Commons Collections library, and […]
Converting Between an Array and a Set in Java
1. Overview In this short article we’re going to look at converting between an array and a Set – first using plain java, then Guava and the Commons Collections library […]
Converting between an Array and a List in Java
1. Overview In this quick tutorial, we’re going to learn how to convert between an Array and a List using core Java libraries, Guava and Apache Commons […]
A Guide to Concurrent Queues in Java
1. Overview In this tutorial, we’ll walk through some of the main implementations of concurrent queues in Java. For a general introduction to queues, refer […]
Guide to the Java Queue Interface
1. Introduction In this tutorial, we’ll be discussing Java’s Queue interface. First, we’ll take a peek at what a Queue does, and some of its core methods. Next, we’ll dive into a […]
Introduction to the Java ArrayDeque
1. Overview In this tutorial, we’ll show how to use the Java’s ArrayDeque class – which is an implementation of Deque interface. An ArrayDeque (also known as an “Array Double Ended […]
Guide to the Java TransferQueue
1. Overview In this article, we’ll be looking at the TransferQueue construct from the standard java.util.concurrent package. Simply put, this queue allows us to create programs according to the […]
A Guide to Java SynchronousQueue
1. Overview In this article, we’ll be looking at the SynchronousQueue from the java.util.concurrent package. Simply put, this implementation allows us to exchange information between threads in a thread-safe […]
Guide to PriorityBlockingQueue in Java
1. Introduction In this article, we’ll focus on the PriorityBlockingQueue class and go over some practical examples. Starting with the assumption that we already know what a Queue is, […]
Using the Map.Entry Java Class
1. Overview We often use maps to store a collection of key-value pairs. Then, at some point, we often need to iterate over them. In this […]
