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public static boolean isLetter(char c) {
int k = 0x80;
return c / k == 0 ? true : false;
}
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public static int strlength(String s) {
if (s == null)
return 0;
char[] c = s.toCharArray();
int len = 0;
for (int i = 0; i < c.length; i++) {
len++;
if (!isLetter(c[i])) {
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