public class SubsystemA {
  public void methodA() {
    System.out.println("SubsystemA methodA()メソッド");
  }
}

public class SubsystemB {
  public void methodB() {
    System.out.println("SubsystemB methodB()メソッド");
  }
}

public class SubsystemC {
  public void methodC() {
    System.out.println("SubsystemC methodC()メソッド");
  }
}

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();
  }
}

public class Client {
  public static void main(String[] args) {
    Facade f = new Facade();
    f.operation1();
    f.operation2();
    f.operation3();
  }
}

C:\JavaHello\Facade>java Client
Facade operation1()メソッド
SubsystemA methodA()メソッド
SubsystemB methodB()メソッド
SubsystemC methodC()メソッド
Facade operation2()メソッド
SubsystemB methodB()メソッド
SubsystemC methodC()メソッド
Facade operation3()メソッド
SubsystemC methodC()メソッド

C:\JavaHello\Facade>