Oct 2, 2009 · When and why should abstract classes be used? I would like to see some practical examples of their uses. Also, what is the difference between abstract classes and interfaces?

This is because the code dealing with Person objects is actually dealing with a higher level abstraction that both Employee and Customer objects share. When dealing with Objects on an abstract level, the …

Mar 2, 2013 · Abstraction, information hiding, and encapsulation are very different, but highly-related, concepts. One could argue that abstraction is a technique that helps us identify which specific …

Apr 13, 2009 · Another good example of abstraction is the Java Virtual Machine (JVM), which provides a virtual or abstract computer for Java code to run on. It essentially takes away all of the platform …

Abstract classes cannot be instantiated, but they can be subclassed. In other words, a class that is declared with abstract keyword, is known as abstract class in java. It can have abstract (method …

Look at the accepted answer. I know abstract is obsolete in interface. I wanted to know why is it still acceptable and what is the history behind abstract interface. You're giving me a Java 101 guide on …

Apr 6, 2012 · In Java, a class can inherit from only one base class. When to Use Both You can offer the best of both worlds, an interface and an abstract class. Implementors can ignore your abstract class …

Sep 13, 2013 · An abstract class may contain non-final variables. Members of a Java interface are public by default. A Java abstract class can have the usual flavours of class members like private, …

I am trying to understand the difference between Data abstraction and procedural abstraction in java. I understand the procedural abstraction is making use of methods that accept formal parameters and …

Feb 15, 2018 · I'm trying to understand the concept of abstraction in java. When I came through some tutorials they said that Abstraction is a process where you show only “relevant” data and “hide” …