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 ...

Generics can be invariant, covariant, or contravariant, affecting how different types relate under inheritance. import java.util.List; import java.util.ArrayList; public class InvarianceExample ...

A method might accept a specific type and its subclasses, but you want to restrict usage to a select few implementations of your own design. Java's open inheritance model can feel like an open ...

That's a good start to help developers understand LSP, but Martin's quick description initially reads like a summary of Java's out-of-the-box inheritance and polymorphism ... we need to calculate the ...