The Java Tutorial goes on to list bullets for when an abstract class should be considered and for when an interface should be considered. Unsurprisingly, these are derived from the previously ...

an abstract class is mainly used to define default behavior for subclasses, it means that all child classes should have performed the same functionality. 1]In Java, a separate keyword abstract is used ...

Comparable Interface In Java, an "interface" is an abstract base class that only serves the purpose of a template for other classes.

The MIDP provides a set of Java APIs known as the LCDUI, which has functionalities similar to the Java Abstract Windows Toolkit (AWT) and Swing APIs in the desktop world.