Here you can find the source of isLatin(char c)
public static boolean isLatin(char c)
//package com.java2s; public class Main { public static boolean isLatin(char c) { return (0x41 <= c && c <= 0x5A) || (0x61 <= c && c <= 0x7A); }/*from w w w. j a va2 s . c o m*/ }