Implement Singleton Design Pattern in Java

Singleton Design Pattern in Java.java

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+// Singleton Pattern Example
+public class Singleton {
+    // Step 1: Create a private static instance of the same class
+    private static Singleton instance;
+
+    // Step 2: Make the constructor private so no one can instantiate directly
+    private Singleton() {
+        System.out.println("Singleton instance created!");
+    }
+
+    // Step 3: Provide a public static method to get the instance
+    public static Singleton getInstance() {
+        if (instance == null) {
+            // Lazy initialization
+            instance = new Singleton();
+        }
+        return instance;
+    }
+
+    // Example method
+    public void showMessage() {
+        System.out.println("Hello from Singleton Pattern!");
+    }
+
+    // Test it
+    public static void main(String[] args) {
+        Singleton s1 = Singleton.getInstance();
+        Singleton s2 = Singleton.getInstance();
+
+        s1.showMessage();
+
+        // Checking if both objects are same
+        System.out.println("Are both instances same? " + (s1 == s2));
+    }
+}