Can I multiply charAt in Java?

Question

When I try to multiply charAt I received \"big\" number:

String s = \"25999993654\";
System.out.println(s.charAt(0)+s.charAt(1));

Result : 103<

Answer 1

Yes - you should parse extracted digit or use ASCII chart feature and substract 48:

public final class Test {
    public static void main(String[] a) {
        String s = "25999993654";
        System.out.println(intAt(s, 0) + intAt(s, 1));
    }

    public static int intAt(String s, int index) {
        return Integer.parseInt(""+s.charAt(index));
        //or
        //return (int) s.charAt(index) - 48;
    }
}