Test

package tankado;

public class Counter {

            public static void main(String[]args){
            Counter c=new Counter();
            System.out.println(c.inc());
            System.out.println(c.dec());
            }


            private int cnt;        //stato locale

            //metodo costruttore
            public Counter(){
                    cnt=0;
                    }
            // metodo
            public int inc(){
                    cnt++;
                    return cnt;
            }
            //metodo
            public int dec(){
                    cnt--;
                    return cnt;
            }
}