Kui palju vastutusi rakendab Singleton muster?

The Singleton pattern implements a primary responsibility: to ensure that a class has only one instance and to provide a global access point to that instance.

In other words, Singleton is responsible for:

• Controlling the creation of the object to prevent multiple instances.
• Providing a single object for use throughout the application.

Example in Java:

public class Singleton {
    private static Singleton instance;

    private Singleton() { }

    public static synchronized Singleton getInstance() {
        if (instance == null) {
            instance = new Singleton();
        }
        return instance;
    }
}

Thus, the pattern solves the problem of managing a single state or resource in the application.