hashtable用法
1 import java.util.Hashtable; 2 public class HashTable { 3 public static void main (String[] args) 4 { 5 Hashtable<String,Object> ht=new Hashtable<String,Object>(); 6 ht.put("xiao wang", 30); 7 ht.put("zhang san", "aaa"); 8 ht.put("he hai", true); 9 10 System.out.println(ht.size()); 11 ht.remove("zhang san"); 12 System.out.println(ht.size()); 13 14 15 System.out.println(ht.get("he hai")); 16 ht.put("he hai", "hello"); 17 System.out.println(ht.get("he hai")); 18 } 19 }
