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How an In-Place Sorting Algorithm Works 1. Introduction In this tutorial, we’ll explain how the in-place sorting algorithm works. 2. In-Place Algorithms The in-place algorithms are those that don’t need any auxiliary data structure in order to transform the input data. Basically, it means that the algorithm doesn’t use extra… Continue Reading java-in-place-sorting
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A Practical Guide to DecimalFormat 1. Overview In this article, we’re going to explore the DecimalFormat class along with its practical usages. This is a subclass of NumberFormat, which allows formatting decimal numbers’ String representation using predefined patterns. It can also be used inversely, to parse Strings into numbers. 2.… Continue Reading java-decimalformat
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Introduction to ActiveWeb 1. Overview In this article, we’re going to illustrate the Activeweb – a full stack web framework from JavaLite – providing everything necessary for the development of dynamic web applications or REST-ful web services. 2. Basic Concepts and Principles Activeweb leverages “convention over configuration” – which means… Continue Reading activeweb
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Looping Diagonally Through a 2d Java Array 1. Overview In this tutorial, we will see how to loop diagonally through a two-dimensional array. The solution that we provide can be used for a square two-dimensional array of any size. 2. Two-Dimensional Array The key in working with elements of an… Continue Reading java-loop-diagonal-array
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Java with ANTLR 1. Overview In this tutorial, we’ll do a quick overview of the ANTLR parser generator and show some real-world applications. 2. ANTLR ANTLR (ANother Tool for Language Recognition) is a tool for processing structured text. It does this by giving us access to language processing primitives like… Continue Reading java-antlr
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Guide to java.util.GregorianCalendar 1. Introduction In this tutorial, we’re going to take a quick peek at the GregorianCalendar class. 2. GregorianCalendar GregorianCalendar is a concrete implementation of the abstract class java.util.Calendar. Not surprisingly, the Gregorian Calendar is the most widely used civil calendar in the world. 2.1. Getting an Instance There are two… Continue Reading java-gregorian-calendar
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The Traveling Salesman Problem in Java Algorithms Java 1. Introduction In this tutorial, we’ll learn about the Simulated Annealing algorithm and we’ll show the example implementation based on the Traveling Salesman Problem (TSP). 2. Simulated Annealing The Simulated Annealing algorithm is a heuristic for solving the problems with a large… Continue Reading java-simulated-annealing-for-traveling-salesman
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Java KeyStore API 1. Overview In this tutorial, we’re looking at managing cryptographic keys and certificates in Java using the KeyStore API. 2. Keystores If we need to manage keys and certificates in Java, we need a keystore, which is simply a secure collection of aliased entries of keys and certificates. We typically… Continue Reading java-keystore
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Avoid Check for Null Statement in Java Java [[java null]] === 1. Overview Generally, null variables, references, and collections are tricky to handle in Java code. Not only are they hard to identify, but they’re also complex to deal with. As a matter of fact, any miss in dealing with null… Continue Reading java-avoid-null-check
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NaN in Java 1. Overview Simply put, NaN is a numeric data type value which stands for “not a number”. In this quick tutorial, we’ll explain the NaN value in Java and the various operations that can produce or involve this value. 2. What is NaN? NaN usually indicates the… Continue Reading java-not-a-number
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