ht.java.bak

不错的教程 适合中高级人员的使用

import java.util.*;
class Student  
{ int english=0; String  name,number;
 Student(String na,String nu,int e)
 {english=e;name=na;number =nu;}
}
public class HT
{ public static void main(String args[])
  { Hashtable hashtable=new Hashtable();
   hashtable.put("199901",new Student("199901","王小林",98));
   hashtable.put("199902",new Student("199902","能林茂",70));
   hashtable.put("199903",new Student("199903","多种林",93));
   hashtable.put("199904",new Student("199904","围林蛤",46));
   hashtable.put("199905",new Student("199905","夹贸林",77));
   hashtable.put("199906",new Student("199906","噔林可",55));
   hashtable.put("199907",new Student("199907","降王林",68));
   hashtable.put("199908",new Student("199908","纠林咯",76));
   Student stu=(Student)hashtable.get("199902");//检索一个元素。 
   System.out.println(stu.number+"  "+stu.name+"  "+stu.english);
   hashtable.remove("199906"); //删除一个元素
  System.out.println("散列表中现在含有："+hashtable.size()+"个元素");
    Enum1eration enum11=hashtable.elements(); 
    while(enum11.hasMoreElements())   //遍历当前散列表。
    {Student s=(Student)enum11.nextElement();
     System.out.println(s.number+"  "+s.name+"  "+s.english);
    }
  }     
}