// lowlevel/AtomicSerialNumbers.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.concurrent.atomic.*;

public class

AtomicSerialNumbers extends SerialNumbers {

private AtomicInteger serialNumber =

new AtomicInteger();

public synchronized int nextSerialNumber() {

return serialNumber.getAndIncrement();

}

public static void main(String[] args) {

SerialNumberChecker.test(

new AtomicSerialNumbers());

}

}

/* Output:

No duplicates detected

*/