设计模式之六：命令模式(简单实现(餐厅点餐模拟流程))

工程名称：

命令接口：CommandInSimple 下载目录：http://www.cnblogs.com/jrsmith/admin/Files.aspx ，CommandInSimple.zip

package com.jyu.command;

/**命令接口*/
public interface Command {

    public void execute();
}

打开电灯的具体命令对象：

package com.jyu.command;

public class LightOnCommand implements Command {

    Light light;
    
    public LightOnCommand(Light light) {
        this.light = light;
    }

    @Override
    public void execute() {
        light.on();
    }

}

遥控器：

package com.jyu.command;

public class RemoteCOntrolTest {

    /**
     * @param args
     */
    public static void main(String[] args) {

        SimpleRemoteControl remote = new SimpleRemoteControl();
        Light light = new Light();
        LightOnCommand lightOn = new LightOnCommand(light);
        
        remote.setCommand(lightOn);
        remote.buttonWasPressed();
    }

}

利用遥控器开灯的简单测试：

package com.jyu.command;

/**遥控器*/
public class SimpleRemoteControl {

    Command slot;
    
    public SimpleRemoteControl() {    }
    
    public void setCommand(Command command) {
        this.slot = command;
    }
    
    public void buttonWasPressed(){
        slot.execute();
    }

}

package com.jyu.command;

public class Light {

    public void on(){
        System.out.println("The Light is on...");
    }
    
    public void off(){
        System.out.println("The Light is off...");
    }
}