Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

Creating mock objects in Java is an art. Frameworks like Mockito or JMock are my go-to tools, offering a range of out-of-the-box solutions for common scenarios. But sometimes, you need a custom touch.

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.

This post shows readers how to create an array in Java. Including: Array Lists, multidimensional arrays, maps, and more.