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How to Get the Size of an Object in Java 1. Overview Unlike C/C++ where we can use sizeof() method to get an object size in bytes, there’s no true equivalent of such method in Java. In this article, we’ll demonstrate how we can still get the size of a… Continue Reading java-size-of-object
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BigDecimal and BigInteger in Java 1. Overview In this tutorial, we will demonstrate BigDecimal and the BigInteger classes. We’ll describe the two data types, their characteristics, and their usage scenarios. We’ll also briefly cover the various operations using the two classes. 2. BigDecimal BigDecimal represents an immutable arbitrary-precision signed decimal number.… Continue Reading java-bigdecimal-biginteger
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Ternary Operator In Java 1. Overview The ternary conditional operator ?: allows us to define expressions in Java. It’s a condensed form of the if-else statement that also returns a value. In this tutorial, we’ll learn when and how to use a ternary construct. We’ll start by looking at its… Continue Reading java-ternary-operator
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The Basics of Java Generics 1. Introduction Java Generics were introduced in JDK 5.0 with the aim of reducing bugs and adding an extra layer of abstraction over types. This article is a quick intro to Generics in Java, the goal behind them and how they can be used to… Continue Reading java-generics
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Java Constructors vs Static Factory Methods 1. Overview Java constructors are the default mechanism for getting fully-initialized class instances. After all, they provide all the infrastructure required for injecting dependencies, either manually or automatically. Even so, in a few specific use cases, it’s preferable to resort to static factory methods… Continue Reading java-constructors-vs-static-factory-methods
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Difference Between JVM, JRE, and JDK 1. Overview In this article, we’ll discuss differences between JVM, JRE, and JDK by considering their components and uses. 2. JVM Java Virtual Machine (JVM) is an implementation of a virtual machine which executes a Java program. The JVM first interprets the bytecode. It… Continue Reading jvm-vs-jre-vs-jdk
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Parsing an XML File Using StAX 1. Introduction In this tutorial, we’ll illustrate how to parse an XML file using StAX. We’ll implement a simple XML parser and see how it works with an example. 2. Parsing with StAX StAX is one of the several XML libraries in Java. It’s… Continue Reading java-stax
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Negate a Predicate Method Reference with Java 11 1. Overview In this short tutorial, we’ll see how to negate a Predicate method reference using Java 11. We’ll start with the limitations encountered in order to achieve this before Java 11. Then we’ll see how the Predicate.not() method helps, as well. 2. Before… Continue Reading java-negate-predicate-method-reference
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Guide to the Externalizable Interface in Java 1. Introduction In this tutorial, we’ll have a quick look at java’s java.io.Externalizable interface. The main goal of this interface is to facilitate custom serialization and deserialization. Before we go ahead, make sure you check out the serialization in Java article. The next… Continue Reading java-externalizable
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Java Switch Statement 1. Overview In this tutorial, we’ll learn what the switch statement is and how to use it. The switch statement allows us to replace several nested if-else constructs and thus improve the readability of our code. Switch has evolved over time – new supported types have been added, particularly… Continue Reading java-switch
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