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1.Basic java collection framework example program to get Value collection from hashtable

  •   Collection values()   This method used to get collection of values
  •  Important note is that if any value is removed from set the original hashtable key also removed
  1. package com.setviewHashtable;
  2.  
  3. import java.util.Hashtable;

  4. import java.util.Enumeration;
  5. import java.util.Iterator;
  6. import java.util.Set;
  7.  
  8. public class HashtableExample{
  9.  
  10. public static void main(String[] args) {
  11.   
  12.  //create Hashtable object
  13.        Hashtable<String,String> hashtable = new Hashtable<String,String>();
  14.        
  15. //add key value pairs to Hashtable
  16. hashtable.put("1","Java Interview Questions");
  17. hashtable.put("2","Java Interview Programs");
  18. hashtable.put("3","Concept and example program");
  19. hashtable.put("4","Concept and interview Questions");
  20. hashtable.put("5","Java Quiz");
  21. hashtable.put("6","Real time examples");
  22.  
  23.  
  24.  Collection c = hashtable.values();
  25.  System.out.println("Values of Collection created from Hashtable are :");
  26. //iterate through the Set of keys
  27.  
  28.  Iterator itr = c.iterator();
  29.  while(itr.hasNext())
  30.  System.out.println(itr.next());
  31.            
  32.  c.remove("Java Quiz");
  33.            
  34. System.out.println("Elements in hash table");
  35. Enumeration e=hashtable.elements();
  36.         
  37.  
  38.  while (e.hasMoreElements()) {
  39.         System.out.println(e.nextElement());
  40. }    

  41. }
  42.  
  43. }
     



Output:

  1. Values of Collection created from Hashtable are :
  2. Real time examples
  3. Java Quiz
  4. Concept and interview Questions
  5. Concept and example program
  6. Java Interview Programs
  7. Java Interview Questions
  8. Elements in hash table
  9. Real time examples
  10. Concept and interview Questions
  11. Concept and example program
  12. Java Interview Programs
  13. Java Interview Questions


Instance Of Java

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