diff -r e10a1f7aaa13 -r 8bf9268df0e2 src/java.base/windows/classes/sun/nio/fs/WindowsFileAttributes.java
--- a/src/java.base/windows/classes/sun/nio/fs/WindowsFileAttributes.java	Thu Dec 13 16:14:07 2018 +0100
+++ b/src/java.base/windows/classes/sun/nio/fs/WindowsFileAttributes.java	Thu Dec 13 15:31:05 2018 +0100
@@ -116,8 +116,7 @@
     static {
         String propValue = GetPropertyAction.privilegedGetProperty(
             "sun.nio.fs.ensureAccurateMetadata", "false");
-        ensureAccurateMetadata = (propValue.length() == 0) ?
-            true : Boolean.valueOf(propValue);
+        ensureAccurateMetadata = propValue.isEmpty() ? true : Boolean.parseBoolean(propValue);
     }
 
     // attributes