In a previous Java 101 tutorial, you learned how to better organize your code by declaring reference types (also known as classes and interfaces) as members of other reference types and blocks. I ...

Objective: To implement the concept of interfaces and packages in Java. Pre-Lab Exercise: Create a package called shape2d. In that package declare an interface called twod and three classes Square, ...

Learn what a variable is, how to declare it, what types of variables exist, and what scope and modifiers mean in Java, one of the most popular programming languages.