import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.locks.StampedLock;
public class Lock6 {
private static int count =
0;
public static void main(String[] args) {
ExecutorService executor = Executors.newFixedThreadPool(
2);
StampedLock
lock =
new StampedLock();
executor.submit(() -> {
long stamp =
lock.readLock();
try {
if (count ==
0) {
stamp =
lock.tryConvertToWriteLock(stamp);
if (stamp ==
0L) {
System.
out.println(
"Could not convert to write lock");
stamp =
lock.writeLock();
}
count =
23;
}
System.
out.println(count);
}
finally {
lock.unlock(stamp);
}
});
ConcurrentUtils.stop(executor);
}
}
转载于:https://www.cnblogs.com/bilaisheng/p/10210919.html
