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Remove value from Java Hashtable example

  1. /*
  2.   Remove value from Java Hashtable example
  3.   This Java Example shows how to remove a key value pair from Hashtable object using
  4.   remove method.
  5. */
  6.  
  7. import java.util.Enumeration;
  8. import java.util.Hashtable;
  9.  
  10. public class RemoveValueFromHashtableExample {
  11.  
  12.   public static void main(String[] args) {
  13.    
  14.     //create Hashtable object
  15.     Hashtable ht = new Hashtable();
  16.    
  17.     //add key value pairs to Hashtable
  18.     ht.put("1","One");
  19.     ht.put("2","Two");
  20.     ht.put("3","Three");
  21.  
  22.     /*
  23.       To remove a key value pair from Hashtable use
  24.       Object remove(Object key) method of Hashtable class.
  25.       It returns either the value mapped with the key or null if no value
  26.       was mapped.    
  27.     */
  28.    
  29.     Object obj = ht.remove("2");
  30.     System.out.println(obj + " Removed from Hashtable");
  31.    
  32.     //print remaining Hashtable values
  33.     Enumeration e = ht.elements();
  34.    
  35.     //iterate through Hashtable values Enumeration
  36.     while(e.hasMoreElements())
  37.       System.out.println(e.nextElement());
  38.   }
  39. }
  40.  
  41. /*
  42. Output would be
  43. Two Removed from Hashtable
  44. Three
  45. One
  46. */