ArrayList Sorting in android

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.Comparator;

import android.app.Activity;

import android.os.Bundle;

public class TestActivity extends Activity {

      /** Called when the activity is first created. */

      @Override

      public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            ArrayList<String> ar_hb = new ArrayList<String>();

            //Add elements to Arraylist

            ar_hb.add("Mayank");

            ar_hb.add("Maku");

            ar_hb.add("Mukesh");

            ar_hb.add("Igroup");

            //sorting function

            Collections.sort(ar_hb);

            //display elements of ArrayList

            System.out.println("ArrayList elements after sorting in ascending order : ");

            System.out.println(Arrays.toString(ar_hb.toArray()));

            System.out.println("ArrayList elements Comparing - ignorecase");

            IgnoreCaseComparator icc = new IgnoreCaseComparator();

            java.util.Collections.sort(ar_hb,icc);

            Collections.sort(ar_hb);

            System.out.println(Arrays.toString(ar_hb.toArray()));

            System.out.println("Reversing the ArrayList");

            Collections.sort(ar_hb, Collections.reverseOrder());

            System.out.println(Arrays.toString(ar_hb.toArray()));

      }

      class IgnoreCaseComparator implements Comparator<String>

      {

            public int compare(String strA, String strB) {

                  return strA.compareToIgnoreCase(strB);

            }

      }

}