Java: charAt convert to int?

Question

I would like to key in my nirc number e.g. S1234567I and then put 1234567 individualy as a integer as indiv1 as cha

Answer 1

I know question is about char to int but this worth mentioning because there is negative in char too ))

From JavaHungry you must note the negative numbers for integer if you dont wana use Character.

Converting String to Integer : Pseudo Code

   1.   Start number at 0

   2.   If the first character is '-'
                   Set the negative flag
                   Start scanning with the next character
          For each character in the string  
                   Multiply number by 10
                   Add( digit number - '0' ) to number
            If  negative flag set
                    Negate number
                    Return number

public class StringtoInt {

public static void main (String args[])
{
    String  convertingString="123456";
    System.out.println("String Before Conversion :  "+ convertingString);
    int output=    stringToint( convertingString );
    System.out.println("");
    System.out.println("");
    System.out.println("int value as output "+ output);
    System.out.println("");
}




  public static int stringToint( String str ){
        int i = 0, number = 0;
        boolean isNegative = false;
        int len = str.length();
        if( str.charAt(0) == '-' ){
            isNegative = true;
            i = 1;
        }
        while( i < len ){
            number *= 10;
            number += ( str.charAt(i++) - '0' );
        }
        if( isNegative )
        number = -number;
        return number;
    }   
}