Java by API/java.util.concurrent.atomic/AtomicLong
AtomicLong: getAndIncrement()
<source lang="java">
import java.util.concurrent.atomic.AtomicLong; public class Main {
public static void main(String[] argv) { AtomicLong nextId = new AtomicLong(); System.out.println(nextId.getAndIncrement()); }
}
</source>