Learn the four types of polymorphism in Java, then start using subtype polymorphism to execute different forms of the same Java method. Polymorphism refers to the ability of some entities to occur in ...

If you're not familiar with object-oriented programming, some of the concepts can be hard to understand, especially if you're a longtime procedural language programmer. Follow along as we take a look ...

Inheritance is a common pattern in object-oriented programming, but it’s not easily replicated in a database. This Java tip shows you how to model inheritance relationships in JPA with Hibernate.

Twenty-three years ago, in his Design Principles and Design Patterns article, Robert "Uncle Bob" Martin boiled down the Liskov substitution principle to the idea that "derived classes should be ...

A programming language structure wherein the data and their associated processing ("methods") are defined as self-contained entities called "objects." Becoming popular in the early 1990s and the norm ...