TheServerSide

Use sealed classes in Java to control your inheritance

Imagine you are an expert object-oriented Java developer who meticulously crafts code the way an artist cares for their masterpiece. You believe clean code is an absolute necessity. Classes with clear ...
InfoQ

Java Feature Spotlight: Sealed Classes

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...
TheServerSide

ObjectOutputStream example: A Java object serialization tutorial

Community driven content discussing all aspects of software development from DevOps to design patterns. In this Java serialization example, we will use both the ObjectOutputStream and the ...
ZDNet

Custom Java ResourceBundle classes bring flexibility to your code

Separating localized resources from the source code where they are used is a well-known and approved design. Java's ResourceBundle class from the java.util package provides a straightforward way to ...
InfoWorld

Polymorphism and inheritance in Java

We will focus on the relationship between polymorphism and Java inheritance. The main thing to keep in mind is that polymorphism requires an inheritance or an interface implementation. You can see ...
InfoWorld

Intro to the Observable design pattern

The Observable design pattern is used in many important Java APIs. One well-known example is a JButton that uses the ActionListener API to execute an action. In this example, we have an ActionListener ...