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src/java.base/share/classes/jdk/internal/misc/InternalLock.java

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@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this

@@ -37,14 +37,14 @@
   */
  public class InternalLock {
      private static final boolean CAN_USE_INTERNAL_LOCK;
      static {
          String s = System.getProperty("jdk.io.useMonitors");
-         if (s != null && (s.isEmpty() || s.equals("true"))) {
-             CAN_USE_INTERNAL_LOCK = false;
-         } else {
+         if (s != null && s.equals("false")) {
              CAN_USE_INTERNAL_LOCK = true;
+         } else {
+             CAN_USE_INTERNAL_LOCK = false;
          }
      }
  
      private final ReentrantLock lock;
  
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