proxy.java

Java 2实用编程百例,一些比较实用的J2SE小程序,可以通过这些程序熟悉JAVA基础知识

package ch10.section03;

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

  public void request() {
    if (realSubject == null) { //这里有个单例
      realSubject = new RealSubject();
    }
    realSubject.request();
    System.out.println("哈哈，是我在处理！");
  }
}