In this subsection, we will see a comparative analysis between the singleton object in Scala and Java. The idea beneath the singleton pattern is to have an implementation that makes sure that only a single instance of a class can exist. Here's an example of the Singleton pattern in Java:

public class DBConnection {
  private static DBConnection dbInstance;
  private DBConnection() {
  }
  public static DBConnection getInstance() {
    if (dbInstance == null) {
      dbInstance = new DBConnection();
    }
    return dbInstance;
  }
}

The Scala object does a similar thing, and it's well taken care of by the compiler. Since there will be only one instance, there is no way for object creation here: