jekyllandhyde.java

非常好的java事例以及带源码事例的java2教程

import java.util.*;

public class JekyllAndHyde extends Observable
{
  String name = "Dr. Jekyll";

  public void drinkPotion()
  {
    name = "Mr.Hyde";
    setChanged();
    notifyObservers();
  }

  public String getName()
  {
    return name;
  }
}