This repository contains Java code that illustrates the concepts of abstract classes, abstract methods, concrete classes, and inheritance. It showcases how these features work together to create a ...

//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() ...

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 ...

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

We can create constructors inside the abstract method, but not in interface. Java interface can have public methods by default while abstract class can have any of public, private, and protected ...

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.