设计模式之外观模式

public class ClassOne{
    public void FunctionOne(){
        System.out.println("ClassOne.");
    }
}

public class ClassTwo{
    public void FunctionTwo(){
        System.out.println("ClassTwo.");
    }
}


public class ClassThree{
    public void FunctionThree(){
        System.out.println("ClassThree.");
    }
}

public class Facade {
    private ClassOne classOne;
    private ClassTwo classTwo;
    private ClassThree classThree;

    public Facade() {
        classOne = new ClassOne();
        classTwo = new ClassTwo();
        classThree = new ClassThree();
    }

    public void FunctionA(){
        System.out.println("Function A");
        classOne.FunctionOne();
        classTwo.FunctionTwo();
    }
    public void FunctionB(){
        System.out.println("Function B");
        classTwo.FunctionTwo();
        classThree.FunctionThree();
    }

}

public class FacadeDemo {
    public static void main(String[] args) {
        Facade facade=new Facade();
        facade.FunctionA();
        facade.FunctionB();
    }
}