Java case insensitive regular expression matching does not match the letter Ñ

Consider this procedure:

import java.util.regex.Pattern;
public class xx {

    /*
     *  Ñ
     *  LATIN CAPITAL LETTER N WITH TILDE
     *  Unicode: U+00D1,UTF-8: C3 91
     */
    public static final String BIG_N = "\u00d1";

    /*
     *  ñ
     *  LATIN SMALL LETTER N WITH TILDE
     *  Unicode: U+00F1,UTF-8: C3 B1
     */
    public static final String LITTLE_N = "\u00f1";

    public static void main(String[] args) throws Exception {
        System.out.println(BIG_N.equalsIgnoreCase(LITTLE_N));
        System.out.println(Pattern.compile(BIG_N,Pattern.CASE_INSENSITIVE).matcher(LITTLE_N).matches());
    }
}

Since Ñ is an uppercase version of ñ, you can expect to print:

true
true

But the actual print (Java 1.7.0_17-b02) is:

true
false

Why?

Solution

http://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html#CASE_INSENSITIVE

For completeness; You or (|) flags together

Pattern.compile(BIG_N,Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE)