Java.....!!!!!!!!!!!

What’s the difference between an interface and an abstract class in Java? It’s best to start answering this question with a brief definition of abstract classes and interfaces and then explore the differences between the two. A class must be declared  abstract  when it has one or more abstract  methods . A method is declared abstract when it has a method heading, but no body – which means that an abstract method has no implementation code inside curly braces like normal methods do. When to use abstract methods in Java? Why you would want to declare a method as abstract is best illustrated by an example. Take a look at the code below: /* the Figure class must be declared as abstract    because it contains an abstract method  */ public abstract class Figure {         /* because this is an abstract method the            body will be blank  */  ...