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.

We also need to define variables based on the type of data that they are going to reference. Three basic types of variable that we are going to introduce in this Java tutorial are: Integers ...

Java provides a way for the programmer ... and you can keep track of which objects have been reclaimed using a reference queue. The example in Listing A could easily be rewritten to work as ...

The default constructor in Java takes no arguments -- it simply initializes reference types to null and primitive types to the binary equivalent of zero. That means instance variables are assigned as ...