19 lines
531 B
Java
19 lines
531 B
Java
// concurrent/GuardedIDField.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 GuardedIDField implements HasID {
|
|
private static AtomicInteger counter =
|
|
new AtomicInteger();
|
|
private int id = counter.getAndAdd(1);
|
|
public int getID() { return id; }
|
|
public static void main(String[] args) {
|
|
IDChecker.test(GuardedIDField::new);
|
|
}
|
|
}
|
|
/* Output:
|
|
0
|
|
*/
|