ChinnapongShutterstockOne of the most effective ways to store and retrieve data in a targeted manner is to use key-value pairs. In Java, you can use the HashMap class to do this. In this tutorial, we explain what a Java HashMap is and how the class works using practical examples. We’ll look at how to…
sdecoretShutterstockThe most important factor in any application written or used with the Java programming language is the Java main() method. After all, it serves as the entry point for every Java program. In this article, we’ll explain exactly what the main() method in Java is, how it works and…
To prevent error messages in your code, it’s best to make sure that objects and classes match. The most useful way of doing this in Java is with the instanceof operator. In this article, we’ll go over what instanceof is and provide you with practical examples of how the operator…
In situations where the smallest digit after the decimal point is important, you need programs that can display these reliably. Java uses BigDecimal, a class that can represent and process complex floating point numbers in detail. In this article, we’ll show you how to use the…
Java’s Math class is a valuable tool for doing calculations in Java. It uses a simple syntax and can be used to perform logarithms, trigonometric tasks and simple numerical calculations. Here you can find out how the Math class works in Java and which methods you can use. We’ll…
If you want to change individual bits, Java’s solution is bitwise operators. With Java bitwise operators, you can step in and manipulate bits in whatever way you’d like. We’ll show you which bitwise operators are available in Java and go over their benefits. We’ll also use some…
ChinnapongShutterstockIf you’re working with source code, it often makes sense to explain work steps. This not only makes it easier for you to find your way around a project, it also makes it easier for other people to collaborate with you. With comments in Java, you can leave explanations directly in…
ESB ProfessionalShutterstockIn job interviews for software development, there’s a strong focus on specialist knowledge. In addition to describing processes and understanding team roles, questions about programming languages are par for the course. One of the most important languages is Java. We’ve put…
One of the biggest advantages of the for-each loop is that it has a simple and clear syntax. This helps to avoid programming errors. The loop can also traverse arrays faster than other loop methods. We’ll show you how to best use the for-each Java loop and provide some examples…
Java lists allow for efficient operations and quick access to elements. Lists are dynamic in size and automatically readjust when elements are added or removed. With classes like ArrayList, LinkedList and Vector, there are different ways to implement them as well. Each class has…
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