java与模式随书源码,作者阎宏博士,包括书中各个设计模式的实现,没有密码,

				package com.javapatterns.command.television;
				
				public class Control
				{    
				    /**
				     * @directed 
				     */
				    private Command onCommand, offCommand, changeChannel;
				
					public Control(Command on, Command off, Command channel)
				    {
						onCommand = on;
						offCommand = off;
				        changeChannel = channel;
					}
				
					public void turnOn()
				    {
						onCommand.execute() ;
					}
				
					public void turnOff()
				    {
						offCommand.execute();
					}
				
				    public void changeChannel()
				    {
				    	changeChannel.execute();
				    }
				}