Java Collection How to - Sort String list in case insensitive order

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Question

We would like to know how to sort String list in case insensitive order.

Answer

//w  w w  . j a  va2 s  .  c om
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main {
  public static void main(String[] argv) throws Exception {
    String[] strArray = new String[] { "z", "a", "java2s.com" };
    List list = Arrays.asList(strArray);

    Collections.sort(list);

    Collections.sort(list, String.CASE_INSENSITIVE_ORDER);

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

    Collections.sort(list, String.CASE_INSENSITIVE_ORDER);
    Collections.reverse(list);
  }
}

The code above generates the following result.

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