JAVA小程序counter计数器

public class Counter {

/**
 * @param args
 */
public static void main(String[] args) {
// TODO Auto-generated method stub
//counterValue x1 = new counterValue(0);
counterValue x2 = new counterValue(3);
System.out.println(x2.increment());
System.out.println(x2.decrement());
System.out.println(x2.reset());
}

}
class counterValue{
int counter;

counterValue(int i){
counter = i;
}
int increment(){
return ++counter;
}
int decrement(){
return --counter;
}
int reset(){
return counter=0;