class Utilities {
/**
* Checks if two subsequent characters in a String are
* are the higher and the lower character in a surrogate
* pair (and therefore eligible for conversion to a UTF 32 character).
* @param text the String with the high and low surrogate characters
* @param idx the index of the 'high' character in the pair
* @return true if the characters are surrogate pairs
* @since 2.1.2
*/
public static boolean isSurrogatePair(final String text, final int idx) {
if (idx < 0 || idx > text.length() - 2)
return false;
return isSurrogateHigh(text.charAt(idx)) && isSurrogateLow(text.charAt(idx + 1));
}
}
