java代码示例(Hashtable)

package learnExample;

import java.util.Hashtable;

public class Learn {
        
 public static void main(String args[])
 {
  Hashtable<String,Integer> Learn = new Hashtable<String, Integer>();  //String为key,int为value
  Learn.put("one", 1);
  Learn.put("two", 2);  
  Learn.put("three",3);
  
  Integer n = Learn.get("two");
  
  if(n!=null)
   System.out.println("two="+n);
  
 
 }
 
}