public class test {
    private static class Int{
        private int i;
        public Int(int i) {
            this.i = i;
        }

        public int getI() {
            return i;
        }

        public void setI(int i) {
            this.i = i;
        }
    }

    public static void main(String[] args) {
        Integer i = 0;
        int k = 0;
        Int j = new Int(0);
        sum(i,j,k);
        System.out.println(String.format("%d,%d,%d",i,j.getI(),k));
    }

    private static void sum(Integer i, Int j, Integer k) {
        i++;
        j.setI(j.getI() + 1);
        k++;
    }
}