外观模式

// 将一些列方法封装成接口暴露给用户
public class Facade {
    private DeviceA deviceA=new DeviceA();
    private DeviceB deviceB=new DeviceB();
    private DeviceC deviceC=new DeviceC();

    public void methed(){
        deviceA.method();
        deviceB.method();
        deviceC.method();
    }
}

public class DeviceA {
    public void method(){
        System.out.println("执行DeviceA的方法");
    }
}
public class DeviceB {
    public void method(){
        System.out.println("执行DeviceB的方法");
    }
}
public class DeviceC {
    public void method(){
        System.out.println("执行DeviceC的方法");
    }
}

//测试
@Test
public void testFacade() {
    Facade facade = new Facade();
    facade.methed();
}