Imagine that your typical Java array is an Excel spreadsheet. Were that the case, you’d have created a table with just a single column. We might consider it a “one dimensional” database, in ...

This Java runtime exception happens when the wrong type of object is placed into an array. In the example below, a BigInteger array is created, followed by an attempt to add a Double. The Double does ...

The java.util.Arrays class provides similar “deep” methods for performing equals and hashCode functionality on multi-dimensional arrays: Arrays.deepEquals and Arrays.deepHashCode.

Array types in Java are not implicitly contravariant, but they can be explicitly contravariant , just like generic types. I’ll offer some examples later in the article.

Community driven content discussing all aspects of software development from DevOps to design patterns. To help demystify the most complicated of these, let’s look at a few different JOptionPane ...