结构型设计模式之外观模式

3.1问题的解决方法

package test;

public class Problem2 {

    public static void main(String[] args) {
        // 结构型模式之外观模式
        SwitchFacade switchFacade=new SwitchFacade();
        switchFacade.onDn();
        switchFacade.offDn();
        switchFacade.onJxq();
        switchFacade.offJxq();
        switchFacade.onKt();
        switchFacade.offKt();
        switchFacade.onTyy();
        switchFacade.offTyy();
    }

}
//电器接口  子系统
interface dq{
    public void on();
    public void off();
}
//电脑实体类
class Dn implements dq{
    @Override
    public void on() {
        // TODO Auto-generated method stub
        System.out.println("电脑开");
    }
    @Override
    public void off() {
        // TODO Auto-generated method stub
        System.out.println("电脑关闭");
    }    
}
//集线器实体类
class Jxq implements dq{
    @Override
    public void on() {
        // TODO Auto-generated method stub
        System.out.println("集线器开");
    }
    @Override
    public void off() {
        // TODO Auto-generated method stub
        System.out.println("集线器关闭");
    }    
}
//空调实体类
class Kt implements dq{
    @Override
    public void on() {
        // TODO Auto-generated method stub
        System.out.println("空调开");
    }
    @Override
    public void off() {
        // TODO Auto-generated method stub
        System.out.println("空调关闭");
    }    
}
//投影仪实体类
class Tyy implements dq{
    @Override
    public void on() {
        // TODO Auto-generated method stub
        System.out.println("投影仪开");
    }
    @Override
    public void off() {
        // TODO Auto-generated method stub
        System.out.println("投影仪关闭");
    }    
}
//外观 总系统
class  SwitchFacade{
    Dn dn=null;
    Jxq jxq=null;
    Kt kt=null;
    Tyy tyy=null;
    public SwitchFacade() {
        dn=new Dn();
        jxq=new Jxq();
        kt=new Kt();
        tyy=new Tyy();        
    }
    //先打开集线器，后打开电脑 
    public void onDn() {        
        jxq.on();
        dn.on();
    }
    //先关闭电脑，后关闭集线器
    public void offDn() {
        jxq.off();
        dn.off();
    }
    
    public void onJxq() {
        jxq.on();
    }
    public void offJxq() {
        jxq.off();
    }
    
    public void onKt() {
        kt.on();
    }
    public void offKt() {
        kt.off();
    }
    
    public void onTyy() {
        tyy.on();
    }
    public void offTyy() {
        tyy.off();
    }
}