Get Set view of Keys from Hashtable - Java Collection Framework

Java examples for Collection Framework:Hashtable

  1. HOME
  2. Java
  3. Collection Framework
  4. Hashtable

Description

Get Set view of Keys from Hashtable

Demo Code

 
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Hashtable;
import java.util.Set;
 
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");
   //from w  w  w  .  j  av  a 2 s .  co m
    Set st = ht.keySet();
   
    System.out.println("Set created from Hashtable Keys contains :");
    Iterator itr = st.iterator();
    while(itr.hasNext())
      System.out.println(itr.next());
    st.remove("2");
   
    System.out.println("Hashtable keys after removal from Set are :");
    Enumeration e = ht.keys();
    while(e.hasMoreElements())
      System.out.println(e.nextElement());
  }
}

Result


Related Tutorials