[Eranga]

Something like this may help in that sense, I think.

Code:

    private void findMax(ArrayList arl) {
        int max = 0;
        for(int i = 0; i < arl.size(); i++) {
            if(Integer.parseInt((String) arl.get(i)) > max) {
                max = Integer.parseInt((String) arl.get(i));
            }
        }
        
        System.out.println(max);
    }