#scala singleton

[topjavatutorial-blog]

Scala Objects

In Scala, an object can mean an instance of a class. Also, “object” can be used as a keyword.

Lets see usage of object as keyword in this article.  

Singleton Object

  A singleton is a class that can have only one instance.

We can use the object keyword to create a Singleton object as follows :

object Greeting { def greet{ println("Hello"); } }

With Greeting defined as an object, there…

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[scalalover-blog]

How to implement Singleton pattern in Scala

In Java we can do like this.

public final class Singleton { private static Singleton instance = new Singleton(); private Singleton() { } public static Singleton getInstance() { return instance; } }

The construct method of class Singleton is private to make sure no one can initialization is by new Singleton() There is only one way to get it's instance by using the getInstance() method, so that mean only one instance of class Singleton exits in your JVM

Scala code

object Singleton { }

So how was it?, is it awesome :)