boxobservable.java

这个文件里面包含了java设计模式的一些例子讲解

package com.javapatterns.observer.monkeyking;

import java.awt.*;
import java.awt.event.*;
import java.util.*;

// You must inherit a new type of Observable:
class BoxObservable extends Observable
{
	public void notifyObservers(Object b)
	{
		// Otherwise it won't propagate changes:
		setChanged();
		super.notifyObservers(b);
	}
}