Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions. Programmers frequently need to ...

Java has a "Random" class that lets you generate a random number you use to implement calculations in your Java source code. You use this library to generate a random number and insert the number into ...

An array in Java is a type of variable that can store multiple values. It stores these values based on a key that can be used to subsequently look up that information. Arrays can be useful for ...

Download the source code for example applications in this tutorial. Created by Jeff Friesen. We’ll look at each of these methods and how you can use them to perform special tasks in the context of ...