检查哈希表中是否存在特定值

 // 来自 N o w  J a v a  .   c o m

import java.util.Hashtable;

 

public class Main {

 

  public static void main(String[] args) {

    Hashtable ht = new Hashtable();

    ht.put("1","One");

    ht.put("2","Two");

    ht.put("3","Three");

   

    boolean blnExists = ht.contains("Two");

    System.out.println("Two exists in Hashtable ? : " + blnExists);/*时 代 J a v a - N o w J a v a . c o m 提供*/

  }

}