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Working with Images in Java 1. Overview In this tutorial, we are going to take a look at a few available image-processing libraries, and perform simple image processing operation – loading an image and drawing a shape on it. We’ll try out AWT (and a bit of Swing) library, ImageJ,… Continue Reading java-images
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Javax BigDecimal Validation 1. Introduction In the tutorial Java Bean Validation Basics, we saw how to apply basic javax validation to various types, and in this tutorial, we’ll focus on using javax validation with BigDecimal. 2. Validating BigDecimal Instances Unfortunately, with BigDecimal, we can’t use the classic @Min or @Max javax annotations. Luckily,… Continue Reading javax-bigdecimal-validation
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Shell Sort in Java 1. Introduction In this tutorial, we’ll describe the Shell sort algorithm in Java. 2. The Shell Sort Overview ==== 2.1. Description Let’s first describe the Shell sort algorithm so we know what we’re trying to implement. Shell sort is based on the Insertion sorting algorithm, and… Continue Reading java-shell-sort
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Parsing YAML with SnakeYAML 1. Overview In this tutorial, we’ll learn how to use SnakeYAML library to serialize Java objects to YAML documents and vice versa. 2. Project Setup In order to use SnakeYAML in our project, we’ll add the following Maven dependency (the latest version can be found here):… Continue Reading java-snake-yaml
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A Guide to XML in Java 1. Overview This is a guide to working with XML in Java. We’ll go over the most common Java XML processing libraries – for both parsing and binding. 2. DOM Parsers Simply put, a DOM parser works on the entire XML document, loads it… Continue Reading java-xml
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Introduction to Nashorn 1. Introduction This article is focused on Nashorn – the new default JavaScript engine for the JVM as of Java 8. Many sophisticated techniques have been used to make Nashorn orders of magnitude more performant than its predecessor called Rhino, so it is a worthwhile change. Let’s… Continue Reading java-nashorn
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Generating Random Numbers in a Range in Java 1. Overview In this tutorial, we’ll explore different ways of generating random numbers within a range. 2. Generating Random Numbers in a Range ==== 2.1. Math.random The Math.random gives a random double value which is greater than or equal to 0.0 and… Continue Reading java-generating-random-numbers
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Read an InputStream using the Java Server Socket Java 1. Overview To send and receive data over a network, we often use sockets. Sockets are nothing but a combination of an IP address and a port number, which can uniquely identify a program running on any given machine. In this… Continue Reading java-inputstream-server-socket
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How to Print Screen in Java 1. Overview When you need to perform a print screen action on your desktop, there is an built-in ‘PrntScr’ button on the keyboard to help you with it. Sometimes that’s enough. But the issue arises when you need to do that action programmatically. Simply… Continue Reading print-screen-in-java
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Java “Back to Basics” Tutorial This tutorial series focuses on core Java – “Back to Basics”. We’re going to cover Java Collections and Java IO: 1. Core Java Language Concepts + Java – Try with Resources + Guide to the Synchronized Keyword in Java + A Guide to Java 9… Continue Reading java-tutorial
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