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Create Java ArrayList From Enumeration Example

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  1. /*
  2.   Create Java ArrayList From Enumeration Example
  3.   This java example shows how to create an ArrayList from any Enumeration object
  4.   using list method of Collections class.
  5. */
  6.  
  7. import java.util.ArrayList;
  8. import java.util.Collections;
  9. import java.util.Enumeration;
  10. import java.util.Vector;
  11.  
  12. public class CreateArrayListFromEnumerationExample {
  13.  
  14.   public static void main(String[] args) {
  15.    
  16.     //create a Vector object
  17.     Vector v = new Vector();
  18.    
  19.     //Add elements to Vector
  20.     v.add("A");
  21.     v.add("B");
  22.     v.add("D");
  23.     v.add("E");
  24.     v.add("F");
  25.    
  26.     System.out.println("Vector contains : " + v);
  27.    
  28.     /*
  29.       To create ArrayList from any Enumeration, use
  30.       static ArrayList list(Enumeration e) method of Collections class.
  31.      
  32.       This method returns the ArrayList containing the elements returned by
  33.       specified Enumeration object in order they are returned.
  34.     */
  35.    
  36.     //Get Enumeration over Vector
  37.     Enumeration e = v.elements();
  38.    
  39.     //Create ArrayList from Enumeration of Vector
  40.     ArrayList aList = Collections.list(e);
  41.    
  42.     System.out.println("Arraylist contains : " + aList);
  43.        
  44.   }
  45. }
  46.  
  47. /*
  48. Output would be
  49. Vector Contains : [A, B, D, E, F]
  50. Arraylist contains : [A, B, D, E, F]
  51. */