请问自己定义的对象如何使用Hashtable存取?

Question

import java.util.*;
import java.text.*;public class InfoDetail {  public String id;
  public String type;
  public String company_id;
  public String oper_id;
  public String send_time;
  public String title;
  public String keyWords;
  public String content;
  public String time;  public InfoDetail() {    this.id = getid();
  }
}/////////////////////////////////////
      InfoDetail ID = new InfoDetail();
      ID.id = ss.getByName("id");
      ID.type = ss.getByName("type");
      ID.company_id = ss.getByName("city");
      ID.oper_id = ss.getByName("person");
      ID.time = ss.getByName("time");
      System.out.println("time:"+ID.time);//有内容
      ID.title = ss.getByName("title");
      ID.keyWords = ss.getByName("keywords");
      ID.content = ss.getByName("content");
      hash_info.put("ok",ID);
      hash_info.put("count",Integer.toString(count));
      InfoDetail tmp = (InfoDetail)hash_info.get("ok");
      System.out.println("time:"+tmp.time);//nullpoint error

Answer 1

对不起,这个代码反而可以了.
奇怪.我自己看看吧.分给你.