We have a concurrent package, and JRE locks live in a similar package,

so let's put our new code in there.

src/main/java/org/apache/commons/lang3/concurrent/Locks.java

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.commons.lang3;
+package org.apache.commons.lang3.concurrent;
 
 import java.util.Objects;
 import java.util.concurrent.locks.StampedLock;
@@ -24,7 +24,8 @@
 import org.apache.commons.lang3.function.FailableFunction;
 
 
-/** Utility class for working with {@link java.util.concurrent.locks.Lock locked objects}. Locked objects are an
+/** 
+ * Utility class for working with {@link java.util.concurrent.locks.Lock locked objects}. Locked objects are an
  * alternative to synchronization.
  *
  * Locking is preferable, if there is a distinction between read access (multiple threads may have read
@@ -64,8 +65,10 @@
  *         lock.runWriteLocked((ps) -> { ps.write(buffer); ps.println(); });
  *     }
  * </pre>
+ * @since 3.11
  */
 public class Locks {
+
     public static class Lock<O extends Object> {
         private final O lockedObject;
         private final StampedLock lock = new StampedLock();

src/test/java/org/apache/commons/lang3/concurrent/LocksTest.java

@@ -14,13 +14,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.apache.commons.lang3;
+package org.apache.commons.lang3.concurrent;
 
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.function.LongConsumer;
 
-import org.apache.commons.lang3.Locks.Lock;
+import org.apache.commons.lang3.concurrent.Locks;
+import org.apache.commons.lang3.concurrent.Locks.Lock;
 import org.apache.commons.lang3.function.FailableConsumer;
 import org.junit.jupiter.api.Test;