infomodel.java

面向对象的mfc的例子

import java.util.*;

public class InfoModel{
   private String message;
   private String weather;
   private  ArrayList listeners=new ArrayList();

   public String getMessage( ){
        return message;
   }
   public String getWeather( ){
        return weather;
   }
 
  public void setMessage(String msg){
         message=msg;
         fireModelChangeEvent("msgchanged");
   }
  public void setWeather(String wth){
         weather=wth;
         fireModelChangeEvent("wthchanged");
   }
 
  public void addModelChangeListener(InfoView view){ 
               listeners.add(view);
  }
  public void removeModelChangeListener(InfoView view){ 
              listeners.remove(view);
  }

  protected void fireModelChangeEvent(Object o){ 
             for(int i=0; i<listeners.size();i++){
                  Object ot= listeners.get(i);
                  InfoView iv=(InfoView)ot;
                  iv.processModelChange(o);
             }
  }
}