import java.util.Observable;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.IntBinaryOperator;
import java.util.function.IntUnaryOperator;
import java.util.Observable;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.IntBinaryOperator;
import java.util.function.IntUnaryOperator;
public class ObservableAtomicInteger extends Observable {
private AtomicInteger holder;
ObservableAtomicInteger() {
public class ObservableAtomicInteger extends Observable {
private AtomicInteger holder;
ObservableAtomicInteger() {