Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

Learn to use method overriding and abstract classes to achieve dynamic polymorphism in Java, a feature that allows different implementations of the same method.

As you learned in my recent introduction to programming with classes and objects, you initialize an object via the code that you place in a class’s constructor. Consider Listing 7. Listing 7.

The Factory Method pattern defines an interface or abstract class for creating objects in a superclass but allows subclasses to alter the type of objects to be created. Create an abstract superclass ...

Course work for Coursera Online class Object Oriented Programming in Java Specialization - xiaomei7/Coursera ... methods and constructors Explain how to overload methods in Java and why overloading ...

Any method you can conjure up takes an object and returns an object that fulfills the Java Function contract. How to use Java’s Function interface. For this Java Function interface example, we will ...

Java Coding Samples. Various Java programs to illustrate various concepts. A Hello World! Java program. Calling Methods. A sample of how to call methods in the same class. For loop. A simple example ...

The apply method is the single method required by all classes that implement the UnaryOperator interface. We will use generics in the class declaration, <String>, to indicate this UnaryOpeartor’s ...