Create and use CollationKey in Java

/*from  w w  w.j  av a2 s. c  o  m*/
/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
 * Copyright (c) 1995-1998 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for NON-COMMERCIAL purposes and without fee is hereby granted
 * provided that this copyright notice appears in all copies. Please refer to
 * the file "copyright.html" for further important copyright and licensing
 * information.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 */

import java.text.CollationKey;
import java.text.Collator;
import java.util.Locale;

public class Main {

  public static void sortArray(CollationKey[] keys) {

    CollationKey tmp;

    for (int i = 0; i < keys.length; i++) {
      for (int j = i + 1; j < keys.length; j++) {
        // Compare the keys
        if (keys[i].compareTo(keys[j]) > 0) {
          // Swap keys[i] and keys[j]
          tmp = keys[i];
          keys[i] = keys[j];
          keys[j] = tmp;
        }
      }
    }
  }

  static void displayWords(CollationKey[] keys) {

    for (int i = 0; i < keys.length; i++) {
      System.out.println(keys[i].getSourceString());
    }
  }

  static public void main(String[] args) {

    Collator enUSCollator = Collator.getInstance(new Locale("en", "US"));

    String[] words = { "peach", "apricot", "grape", "lemon" };

    CollationKey[] keys = new CollationKey[words.length];

    for (int k = 0; k < keys.length; k++) {
      keys[k] = enUSCollator.getCollationKey(words[k]);
    }

    sortArray(keys);
    displayWords(keys);
  }
}