Java Utililty Methods Parse Int

long parseInt(char[] input, ParsePosition offset, int length)
parse Int

long result = 0;
int i;
while ((i = offset.getIndex()) < length) {
 char c = input[i];
 if (c >= '0' && c <= '9') {
 result = (result * 10) + (c - '0');
 offset.setIndex(i + 1);
 } else
...

int parseInt(char[] strs, int beginindex, int endindex)
parse Int

int result = 0;
int b = 1;
for (int i = endindex - 1; i >= beginindex; i--) {
 if (strs[i] < 48 || strs[i] > 57) {
 throw new ParseException("Parse error,can't parse char to int . ", 0);
 result = result + (strs[i] - 48) * b;
 b *= 10;
...

long parseInt(String src, Locale loc)
parse Int

if (loc == null) {
 loc = Locale.getDefault();
NumberFormat nf = NumberFormat.getNumberInstance(loc);
nf.setParseIntegerOnly(true);
return nf.parse(src).longValue();

int parseInt(String stringValue)
parse Int

return parseNumber(stringValue).intValue();

int parseInt(String value)
Parse a string containing an integer with locale specific formatting.

return Integer.parseInt(parsePrepare(value));

long parseInteger(PushbackReader reader)
parse Integer

boolean negative = parseOptionalSign(reader);
return parseNonNegativeInteger(reader) * (negative ? -1 : 1);

Integer parseInteger(String text)
Returns text converted to an integer value or throws an exception.

int def = 0;
if (text == null)
 return def;
def = nf.parse(text).intValue();
return def;