package ch10.section03;

public class Proxy
    implements Subject {
  private RealSubject realSubject;
  public Proxy() {
  }

  public void request() {
    if (realSubject == null) { //這里有個單例
      realSubject = new RealSubject();
    }
    realSubject.request();
    System.out.println("哈哈，是我在處理！");
  }
}