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Remove all values from Java Hashtable example

  1. /*
  2.   Remove all values from Java Hashtable example
  3.   This Java Example shows how to remove all values from Hashtable object or empty
  4.   Hashtable or clear Hashtable using clear method.
  5. */
  6.  
  7. import java.util.Hashtable;
  8.  
  9. public class EmptyHashtableExample {
  10.  
  11.   public static void main(String[] args) {
  12.    
  13.     //create Hashtable object
  14.     Hashtable ht = new Hashtable();
  15.    
  16.     //add key value pairs to Hashtable
  17.     ht.put("1","One");
  18.     ht.put("2","Two");
  19.     ht.put("3","Three");
  20.  
  21.     /*
  22.       To remove all values or clear Hashtable use
  23.       void clear method() of Hashtable class. Remove method removes all
  24.       key value pairs contained in Hashtable.
  25.     */
  26.    
  27.     ht.clear();
  28.    
  29.     System.out.println("Total key value pairs in Hashtable are : " + ht.size());
  30.   }
  31. }
  32.  
  33. /*
  34. Output would be
  35. Total key value pairs in Hashtable are : 0
  36. */

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