![]() You can use an object in Kotlin to extend some class or implement some interface just like a normal class. Singleton variableName property : New Name So, the output of the above code will be:Ĭlass init method. Here, in the above example, we are having one function namedĬlass is instantiated, then changes can be reflected in theĬlass. Let’s have an example of the Singleton class in Kotlin. The object gets instantiated when it is used for the first time. The constructor method is not allowed in an object so we can use the init method if some initialization is required and the object can be defined inside a class. Very simple? Don’t worry, let’s look at the explanation.Ĭlass can have functions, properties, and the Nothing! Are you kidding? No, that’s the code for using Singleton class in Kotlin. ![]() Below is the Kotlin code for Singleton class: Let’s look at the Kotlin code for the same. When creating the instance to ensure that there is no thread interference, we use the Private static Singleton instance = null The following rules are followed to make a Singleton class:įollowing is the example of Singleton class in java: The instance of the singleton class should be globally accessible so that each class can use it. Also, outer classes and subclasses should be prevented to create the instance. The singleton class has only one instance and this is done by providing an instance of the class, within the class. So it is better to create only once and use again and again the same object.įollowing are the properties of a typical singleton class: Generally, it is done because it takes the resource of the system to create these objects again and again. It is used where we need only one instance of the class like NetworkService, DatabaseService, etc. In this blog, we will learn how to make a singleton class in Kotlin? So, let’s get started.Ī singleton class is a class that is defined in such a way that only one instance of the class can be created and used everywhere. So, to implement the Singleton pattern in our project or software, we make a Singleton Pattern is a software design pattern that restricts the instantiation of the class to only “one” instance. In Android App, for an object which is required to be created only once and use everywhere, we use the
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