bin2dec em java

import java.util.ArrayList;
import java.util.Collections;

public class bin2dec {

    public static void main(String args[]) {
        String bin = "1111101000";
        int t = bin.length();
        ArrayList m = new ArrayList();
        m.add(1);
        int i = 1;
        int v = 1;

        while (i < t) {
            v += v;
            m.add(v);
            i++;
        }
        Collections.reverse(m);
        i = 0;
        int dec = 0;
        String elem;
        while (i < t) {
            elem = Character.toString(bin.charAt(i));
            if (elem.equals("1")) {
                dec = dec + Integer.parseInt(m.get(i).toString());
            }
            i++;
        }


    }
}