What is a Singleton design pattern ❓ #binary_brains_b2 #javabrains #javaexperts

What is a Singleton design pattern ❓ #binary_brains_b2 #javabrains #javaexperts
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The Singleton Design Pattern ensures that a class has only one instance throughout the application and provides a global point of access to it.

Key Features:

1. Single Instance: Only one object is created for the class.
2. Global Access Point: The instance can be accessed from anywhere in the program.
3. Lazy Initialization (optional): The instance is created only when it’s needed.
Implementation Example:

public class Singleton {
// Static variable to hold the single instance
private static Singleton instance;

// Private constructor to prevent instantiation
private Singleton() {}

// Public method to provide the instance
public static Singleton getInstance() {
if (instance == null) {
instance = new Singleton();
}
return instance;
}

public void showMessage() {
System.out.println("Hello from Singleton!");
}
}

Usage:

public class Main {
public static void main(String[] args) {
Singleton obj = Singleton.getInstance();
obj.showMessage();
}
}
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