Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes ...

For an introduction to Java interfaces, including the difference between classes and interfaces, see my Java 101 tutorial Working with interfaces in Java. Nesting interfaces in classes.

When a Java wants to connect to a database, it calls upon a JDBC interface known as the DriverManager, which loads a driver that has been written specifically by the vendor of the database to which ...