import java.util.Observer;
import java.util.Observable;

public class Person implements Observer {
  // Constructor
  public Person(String name, String says) {
    this.name = name;
    this.says = says;
  }

  // Called when observing an object that changes
  public void update(Observable thing, Object o) {
    System.out.println("It’s " + ((JekyllAndHyde)thing).getName() + "\n" + name + ": " + says);
  }

  private String name;                                                 // Person’s identity
  private String says;                                                 // What they say when startled
}