Method parse

vm/JavaAPI/src/java/lang/Long.java:142–166

(String string, int offset, int radix, boolean negative)

    }

    private static long parse(String string, int offset, int radix, boolean negative) {
        long max = Long.MIN_VALUE / radix;
        long result = 0, length = string.length();
        while (offset < length) {
            int digit = Character.digit(string.charAt(offset++), radix);
            if (digit == -1) {
                throw invalidLong(string);
            }
            if (max > result) {
                throw invalidLong(string);
            }
            long next = result * radix - digit;
            if (next > result) {
                throw invalidLong(string);
            }
            result = next;
        }
        if (!negative) {
            result = -result;
            if (result < 0) {
                throw invalidLong(string);
            }
        }
        return result;
    }

    private static NumberFormatException invalidLong(String s) {
        throw new NumberFormatException("Invalid long: \"" + s + "\"");