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Fail-Safe Iterator vs Fail-Fast Iterator 1. Introduction In this article, we’ll introduce the concept of Fail-Fast and Fail-Safe Iterators. Fail-Fast systems abort operation as-fast-as-possible exposing failures immediately and stopping the whole operation. Whereas, Fail-Safe systems don’t abort an operation in the case of a failure. Such systems try to avoid… Continue Reading java-fail-safe-vs-fail-fast-iterator

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 using Java 8, one using Guava, one using Apache Commons Collections, and one using only the standard Java 7 SDK.… Continue Reading java-combine-multiple-collections

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 introduced in Java 1.2 as a replacement of Enumerations and: introduced improved method names made it possible… Continue Reading java-iterator

Differences Between Collection.clear() and Collection.removeAll() 1. Overview In this quick tutorial, we’ll learn about two Collection methods that might seem to do the same thing, but aren’t: clear() and removeAll(). We’ll first see the method definitions and then use them in short examples. 2. Collection.clear() We’ll first dive into the Collection.clear() method. Let’s check… Continue Reading java-collection-clear-vs-removeall

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 first using Arrays.sort() method. We’ll define the following int arrays in a @Before jUnit method:… Continue Reading java-sorting