src/java.base/share/classes/java/util/concurrent/locks/LockSupport.java

*** 131,140 ****
--- 131,142 ----
   *   static {
   *     // Reduce the risk of "lost unpark" due to classloading
   *     Class<?> ensureLoaded = LockSupport.class;
   *   }
   * }}</pre>
+  *
+  * @since 1.5
   */
  public class LockSupport {
      private LockSupport() {} // Cannot be instantiated.
  
      private static void setBlocker(Thread t, Object arg) {