Reverse Elements Of Java Array
Overview: In this quick tutorial, we’ll learn ways in which we can invert or reverse an array. We’ll first look at the most basic Java implementations and later cover a few third-party options. Problem Definition: Consider we have an array of elements: Integer[] intArr = {12, 30, 1, 7, 4}; Our problem is to be […]
Maven Resources Plugin
Introduction: In this tutorial, we’ll learn about Maven Resources Plugin. We’ll start by learning what it is used for and finally learn to configure it in our own Maven project. So let’s start by understanding what’s a resource? Resources are non-source code files like xmls, images, property files etc that we use in our projects. […]
Guide to Maven Compiler Plugin
1. Introduction: Maven Compiler plugin is one of the core plugins of Apache Maven. It helps us to compile the sources of our maven project. It uses javax.tools.JavaCompiler as its default compiler. If we wish to use javac as the compiler, we can set forceJavacCompilerUse option value to true. 2.Compiler Plugin Goals: The Maven Compiler […]
“final” Keyword In Java
Introduction: The final keyword in Java is a non-access specifier. We can apply it to a variable, method or a class. In this tutorial, we’ll learn its usage in each of these contexts. final Variable: The variables declared as final are nothing but constants i.e. any attempt to reassign a value to those variables will […]
Comparing Strings In Java
Introduction: Strings are used all over in any Java application. So, it’s important to understand how to compare two string objects. In this article, we’ll learn ways to compare String objects. 1.) Comparing References Using ‘==’ The == operator when used to compare strings is responsible for comparing only the references(not the content). So […]
Find Sum/Average In Java Array
Introduction: In this article, we’ll learn to find the sum and average of all elements in a given Java array. We’ll first cover the basic for loop-based approach and then extend our knowledge to achieve the same using Java Streams API. Finding Sum of Elements In Array: Let’s look at how we can find the […]
Find Maximum/Minimum Element In Java Array
Introduction: In this quick tutorial, we’ll learn ways to find the maximum/minimum element in a Java array of primitives. We’ll start with the very basic algorithms and end up with a solution using Java 8 Streams API. Approach 1:: Linear Search It is a pretty straightforward approach to find max/min elements in a given […]
KeyStore vs TrustStore In Java
Introduction: The two terms truststore and keystore are often confused and seem daunting to even many senior developers at first. In this tutorial, we’ll cover the differences between a truststore and a keystore. We also suggest you read our article on How Https Works – SSL/TLS, which will help you understand the basics of Http […]
Java 9 New Features
Introduction: Oracle Java 9 has a large set of new features including the various upgrades to the programming tools and libraries. In this tutorial, we’ll have a look at a few of those features. 1.) Java 9 REPL(JShell) Let’s cover the fun part first! In Java 9, Oracle introduced a tool called REPL(Read Evaluate Print […]
Java 8 groupingBy Collector
Introduction: GroupingBy Collectors introduced in Java 8 provides us a functionality much similar to using GROUP BY clause in a SQL statement. It helps us group objects based on certain property, returning a Map as an outcome. In this article, we’ll look at various example usages of the groupingBy collector in Java 8. To follow […]