public class Facade {
  SubsystemA a;
  SubsystemB b;
  SubsystemC c;

  public Facade() {
    a = new SubsystemA();
    b = new SubsystemB();
    c = new SubsystemC();
  }

  public void operation1() {
    System.out.println("Facade operation1()メソッド");
    a.methodA();
    b.methodB();
    c.methodC();
  }

  public void operation2() {
    System.out.println("Facade operation2()メソッド");
    b.methodB();
    c.methodC();
  }

  public void operation3() {
    System.out.println("Facade operation3()メソッド");
    c.methodC();
  }
}