این هم کد

[dasssnj]

این هم کد تبدیل string به int با الگوریتمی متفاوت از Integer.parseInt .

    public static int strToint(String e) throws NumberFormatException {

        if (e == null || e.length() < 1 || e.equals("")) //string moshkel dare

            throw new NumberFormatException("String : " + e + " is corrupt !");

        

        char[] ch = e.toCharArray();

        boolean negative = false; //manfi

        int len = ch.length; // toole adad

        int[] i = new int[len]; //araye adad

        short j, k; // adad halghe ha

        int result = 0; //javab

        if (ch[0] == '-') { //manfi

            if (e.length() == 1) 

                throw new NumberFormatException("String : " + e + " is corrupt !");

            

            negative = true; // manfi mishe

            ch = e.substring(1).toCharArray();

            len = ch.length;

        } else if (ch[0] == '+') { //mosbat

            if (e.length() == 1) 

                throw new NumberFormatException("String : " + e + " is corrupt !");

            ch = e.substring(1).toCharArray();

            len = ch.length;

        }

   

        for (j = 0; j < len; j++) {

            if (ch[j] < '0' || ch[j] > '9') // bayad beine 0 ta 9 bashe

                throw new NumberFormatException("String : " + e + " Not a Number !");

            i[j] = ch[j] - 48; // az char ke adad bashe 48 ta kam koni mishe int

            for (k = 0; k < len - (j + 1); k++) 

                i[j] *= 10; //sefr ha ra mizaram ba zarb dar 10

            

            result += i[j]; // hala jam mikonam

            if (result < 0) //aslan nabayad manfi bashe

            {

                if (result == -2147483648 && negative) {//No problem (-|0)

                    // irad az man nist . system manfi bar migardoone . baray hamin in shart lazeme

                } else //adad bozorg tar az int

                {

                    throw new NumberFormatException("Number : " + e + " is out of range for int! ");

                }

            }

        } 

        return negative ? -result : result; // manfi bashe ya mosbat

    }