What are some common design patterns in Java and how do I implement them?

What are some common design patterns in Java and how do I implement them?

Some common design patterns in Java include Singleton, Factory, and Observer. Would you like to know how to implement one?

Yes, can you explain the Singleton pattern?

The Singleton pattern ensures a class has only one instance and provides a global point of access. You can implement it by making the constructor private and creating a static method to get the instance.

Can you show me a code example of the Singleton pattern?

Sure! Here's a simple implementation:

public class Singleton {
    private static Singleton instance;

    private Singleton() {}

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