Enum class initialization in Java

Question

In Java we can do the following to initialize class and call method inside that class:

public class MyClass {
  public String myClassMethod() {
    return \"         


        

Answer 1

It's a simple implementation of the Singleton pattern, relying on the mechanisms of how Enum's work.

If you use MyEnumClass.INSTANCE a second time, you'll get the same object instance.

In contrast, new MyClass(); will create a new object.

See also discussion here:

What is the best approach for using an Enum as a singleton in Java?

There would possibly be more to learn by reading Java Language Spec Section 8-9