How to use the JOptionPane’s showOptionDialog method Java’s JOptionPane provides a simple way to read input from the user and display information back. The JOptionPane’s list of methods includes many ...

The Java Scanner class provides the following self-explanatory methods: nextInt() nextByte() nextBoolean() nextFloat() nextDouble() nextLong() nextShort() But the one method it doesn’t have is ...

Learn the four types of polymorphism in Java, then start using subtype polymorphism to execute different forms of the same Java method.

This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!

What is the contract between equals() and hashcode()? Learn how these methods work together when comparing objects in Java.