When default methods were introduced in Java 8, some developers thought they would be the same as abstract classes. That’s not true, however, because interfaces can’t have state. A default ...

//more classes will be formed. //objects can't be formed abstract classes. abstract public void greet();//abstract method makes class abstract. //anything can be overwritten into greet. //greet() ...

Dynamic polymorphism in Java involves method overriding and abstract classes. Abstract classes declare methods without providing implementation, leaving it to subclasses to define specific behavior.

I am going to share with you the difference. I've written the article about an interface and an abstract class in Java. We just use an interface as a declaration of methods. We do not implement any ...

public abstract class Ellipse2D extends RectangularShape ... Declaring a local class within an enclosing class instance method (EnclosingClass.java, version 3) class EnclosingClass { void ...

protected and private concrete methods, while interfaces have all fields as automatically public, static and final. Interfaces, however, support multiple inheritances where abstract classes don't.