Java Singleton Pattern

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    import java.io.; import java.util.;

    class Singleton { // static instance of Singleton (only one allowed) private static Singleton single_instance = null;

    // a variable to store string
    public String str;
    
    // private constructor to prevent instantiation
    private Singleton() {}
    
    // method to return the single instance
    public static Singleton getSingleInstance() {
        if (single_instance == null) {
            single_instance = new Singleton();
        }
        return single_instance;
    }
    

    }

    public class Solution { public static void main(String[] args) { Scanner sc = new Scanner(System.in);

        // get the single instance
        Singleton s = Singleton.getSingleInstance();
    
        // set value from input
        s.str = sc.nextLine();
    
        // print output
        System.out.println("Hello I am a singleton! Let me say " + s.str + " to you");
    }
    

    }