What are alternatives to soft, weak, and phantom references and how do they compare?

        // Example: Using Strong and Hard References
        public class StrongReferenceExample {
            public static void main(String[] args) {
                String strongRef = new String("Hello, World!");
                
                // Strong Reference
                System.out.println(strongRef); // "Hello, World!"
                
                // The object remains in memory until no strong references exist
                strongRef = null; // Now the object may be garbage collected
            }
        }