public class SupplementaryCharTest4 {
    public static void main(String[] args) {
        char[] ch = new char[]{(char)0xD801, (char)0xDC00,
                               (char)0xD801, (char)0xDC01,
                               (char)0xD801, (char)0xDC02,
                               (char)0xD801, (char)0xDC03,
                               (char)0xD801, (char)0xDC04,
                               (char)0xD801, (char)0xDC05,
                               (char)0xD801, (char)0xDC06,
                               (char)0xD801, (char)0xDC07,
                               (char)0xD801, (char)0xDC08,
                               (char)0xD801, (char)0xDC09,
                               (char)0xD801, (char)0xDC0A};
        String str = new String(ch);

        int codePoint1 = str.codePointAt(0);
        System.out.format("CodePoint at 0 : %X%n", codePoint1);
        int codePoint2 = str.codePointAt(1);
        System.out.format("CodePoint at 1 : %X%n", codePoint2);
        int codePoint3 = str.codePointAt(2);
        System.out.format("CodePoint at 2 : %X%n", codePoint3);
        int codePoint4 = str.codePointAt(3);
        System.out.format("CodePoint at 3 : %X%n", codePoint4);


        int codePoint5 = str.codePointBefore(2);
        System.out.format("CodePoint before 2 : %X%n", codePoint5);
        int codePoint6 = str.codePointBefore(3);
        System.out.format("CodePoint before 3 : %X%n", codePoint6);
        int codePoint7 = str.codePointBefore(4);
        System.out.format("CodePoint before 4 : %X%n", codePoint7);
        int codePoint8 = str.codePointBefore(5);
        System.out.format("CodePoint before 5 : %X%n", codePoint8);
    }
}