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Java Convert Collection to ArrayList
Submitted by Deepthi on Sat, 11/13/2010 - 18:38
This Java convert Collection to ArrayList example shows how to convert any collection to ArrayList.
  1. import java.util.ArrayList;
  2. import java.util.HashSet;
  3.  
  4. //Java Convert Collection to ArrayList
  5.  
  6. public class ConverCollectionToArrayList {
  7.    
  8.     public static void main(String args[]){
  9.        
  10.         //Create new HashSet
  11.         HashSet<String> hashSetColors = new HashSet<String>();
  12.         hashSetColors.add("White");
  13.         hashSetColors.add("Black");
  14.         hashSetColors.add("Blue");
  15.        
  16.         /*
  17.          * To convert any Collection to ArrayList use,
  18.          * ArrayList(Collection collection) constructor of Java
  19.          * ArrayList class.
  20.          */
  21.         ArrayList<String> aListColors = new ArrayList<String>(hashSetColors);
  22.        
  23.         //print values of an ArrayList created from Collection
  24.         for(String color: aListColors){
  25.             System.out.println(color);
  26.         }
  27.     }
  28. }
  29.  
  30. /*
  31. Output of above given Java Collection to ArrayList example would be
  32. Black
  33. Blue
  34. White
  35. */
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