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Guide to sun.misc.Unsafe 1. Overview In this article, we’ll have a look at a fascinating class provided by the JDK – Unsafe from the sun.misc package. This class provides us with low-level mechanisms that were designed to be used only by the core Java library and not by standard users.… Continue Reading java-unsafe
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Quick Guide to RSS with Rome 1. Overview RSS (Rich Site Summary or Really Simple Syndication) is a web feed standard that provides readers with an aggregated content from various locations. The user can see what’s been published recently on his favorite blogs, news sites, etc – all in a… Continue Reading rome-rss
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An Example of Backward Chaining in Drools 1. Overview In this article, we’ll see how what Backward Chaining is and how we can use it with Drools. This article is a part of a series showcasing the Drools Business Rules Engine. 2. Maven Dependencies Let’s start by importing the drools-core… Continue Reading drools-backward-chaining
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Set JAVA_HOME on Windows 7, 8, 10, Mac OS X, Linux 1. Overview In this quick article, we’ll take a look at how to set the JAVA_HOME variable on Windows, Mac OS X, and Linux. 2. Windows ==== 2.1. Windows 10 and 8 . Open Search and type advanced system… Continue Reading java-home-on-windows-7-8-10-mac-os-x-linux
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Measure Elapsed Time in Java 1. Overview In this article, we’re going to have a look at how to measure elapsed time in Java. While this may sound easy, there’re a few pitfalls that we must be aware of. We’ll explore standard Java classes and external packages that provide functionality… Continue Reading java-measure-elapsed-time
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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 Iterator Iterable is one of the main interfaces of the collection classes in Java. The… Continue Reading java-iterable-size
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Using Pairs in Java 1. Overview In this quick article, we discuss the highly useful programming concept known as a Pair. Pairs provide a convenient way of handling simple key to value association and are particularly useful when we want to return two values from a method. A simple implementation… Continue Reading java-pairs
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List of Rules Engines in Java 1. Overview In this article, we’ll go through some of the most popular rule engines for Java. Within mission-critical applications, the process of maintaining business logic within the source code can become too complicated. Business rules can be used to ease the development and… Continue Reading java-rule-engines
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How to Find JAVA_HOME 1. Introduction In this quick post, we’ll learn how to find JAVA_HOME on Windows, Mac, and Linux. As we all know, JAVA_HOME is an environment variable that we commonly use to locate java executables like java and javac. 2. Windows-Specific Ways to Find JAVA_HOME If we’re using Windows as the… Continue Reading find-java-home
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Remove the First Element from a List 1. Overview In this super-quick tutorial, we’ll show how to remove the first element from a List. We’ll perform this operation for two common implementations of the List interface – ArrayList and LinkedList. 2. Creating a List Firstly, let’s populate our Lists: @Before public… Continue Reading java-remove-first-element-from-list
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