Java char type check lower case char by ASCII value

public class Main {
    public static void main(String[] argv) throws Exception {
        char cr = 'a';
        System.out.println(isLowerChar(cr));
    }/*from w  w w.j av a2 s.co  m*/

    public static boolean isLowerChar(char cr) {
        if (cr >= 'a' && cr <= 'z') {
            return true;
        } else {
            return false;
        }
    }
}