The StackOverflowError in Java
1. Overview StackOverflowError can be annoying for Java developers, as it’s one of the most common runtime errors we can encounter. In this article, we’ll see […]
JAVA
Iterating over Enum Values in Java
1. Overview Enum in Java is a datatype that helps us assign a predefined set of constants to a variable. In this quick article, we’ll see […]
ClassNotFoundException vs NoClassDefFoundError
1. Introduction Both ClassNotFoundException and NoClassDefFoundError occur when the JVM can not find a requested class on the classpath. Although they look familiar, there are some core differences between […]
Comparing getPath(), getAbsolutePath(), and getCanonicalPath() in Java
1. Overview The java.io.File class has three methods — getPath(), getAbsolutePath() and getCanonicalPath() — to obtain the filesystem path. In this article, we’ll have a quick look at the differences between them […]
Guide to UUID in Java
1. Overview UUID (Universally Unique Identifier), also known as GUID (Globally Unique Identifier) represents a 128-bit long value that is unique for all practical purposes. The standard representation […]
How to Round a Number to N Decimal Places in Java
1. Overview In this short tutorial, we’ll learn how to round a number to n decimal places in Java. 2. Decimal Numbers in Java Java provides two […]
Java Timer
1. Timer – the Basics Timer and TimerTask are java util classes used to schedule tasks in a background thread. In a few words – TimerTask is the task to […]
Java – Random Long, Float, Integer and Double
1. Generate an Unbounded Long Let’s start with generating a Long: 2. Generate a Long Within a Range 2.1. Random Long With Plain Java Next […]
Java 8 – Powerful Comparison with Lambdas
1. Overview In this tutorial, we’re going to take a first look at the Lambda support in Java 8 – specifically at how to leverage it […]
Binary Numbers in Java
1. Introduction The binary number system uses 0s and 1s to represent numbers. Computers use binary numbers to store and perform operations on any data. […]
Comparing Objects in Java
1. Introduction Comparing objects is an essential feature of object-oriented programming languages. In this tutorial, we’re going look at some of the features of the […]
Using the Not Operator in If Conditions in Java
1. Introduction In Java’s if-else statements we can take a certain action when an expression is true, and an alternative when it is false. In this tutorial, we’ll learn […]
What is a POJO Class?
1. Overview In this short tutorial, we’ll investigate the definition of “Plain Old Java Object” or POJO for short. We’ll look at how a POJO compares to […]
Control Structures in Java
1. Overview In the most basic sense, a program is a list of instructions. Control structures are programming blocks that can change the path we take […]
Concrete Class in Java
1. Introduction In this quick guide, we’ll discuss the term “concrete class” in Java. First, we’ll define the term. Then, we’ll see how it’s different from […]
A Guide to the finalize Method in Java
1. Overview In this tutorial, we’ll focus on a core aspect of the Java language – the finalize method provided by the root Object class. Simply put, this is […]
Object Type Casting in Java
1. Overview The Java type system is made up of two kinds of types: primitives and references. We covered primitive conversions in this article, and we’ll […]
Quick Guide to java.lang.System
1. Overview In this tutorial, we’ll take a quick look at the java.lang.System class and its features and core functionality. 2. IO System is a part of java.lang, and […]
Wrapper Classes in Java
1. Overview As the name suggests, wrapper classes are objects encapsulating primitive Java types. Each Java primitive has a corresponding wrapper: boolean, byte, short, char, int, […]
Guide to the Volatile Keyword in Java
1. Overview In the absence of necessary synchronizations, the compiler, runtime, or processors may apply all sorts of optimizations. Even though these optimizations are beneficial […]
