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’s equals() and hashcode() are two methods that work together to verify if two objects have the same value. You can use them to make object comparisons easy and efficient in your Java programs. In ...

Java array size and length Here are the most important concepts developers must know when they size Java arrays and deal with a Java array’s length: The theoretical maximum Java array size is ...

For new Java programmers, the JOptionPane class is a great visual and user-friendly introduction to user input and Swing-based programming. Here's how to get started.

Learn about serialization in Java with our comprehensive tutorial. We provide examples to help you understand how serialization works.