The decorator design pattern is a structural design pattern that is used for extending the functionality of existing classes without much of a change in the codebase. You can also look at this design pattern as a wrapper around the existing functionality. Let’s dive into the...

So what is a singleton? In a simpleton’s language, a singleton is a class that will be instantiated only once. This essentially means that there will be only one instance of the Java class in the Java Virtual Machine (JVM). The singleton was initially proposed...