How to set view of Keys from Java Hashtable



Problem Description

How to set view of Keys from Java Hashtable?

Solution

Following example uses keys() method to get Enumeration of Keys of the Hashtable.

import java.util.Enumeration;
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");
      Enumeration e = ht.keys();
      
      while (e.hasMoreElements()) {
         System.out.println(e.nextElement());
      }
   }
}

Result

The above code sample will produce the following result.

3
2
1
java_collections.htm
Advertisements