diff -r 2e4903f83295 -r 95efb32d390b src/java.base/share/classes/java/lang/System.java
--- a/src/java.base/share/classes/java/lang/System.java	Wed Dec 12 15:26:49 2018 +0300
+++ b/src/java.base/share/classes/java/lang/System.java	Wed Dec 12 13:28:50 2018 +0100
@@ -801,8 +801,9 @@
         }
 
         if (props == null) {
-            props = SystemProps.initProperties();
-            VersionProps.init(props);
+            Map<String, String> tempProps = SystemProps.initProperties();
+            VersionProps.init(tempProps);
+            props = createProperties(tempProps);
         }
         System.props = props;
     }
@@ -1960,17 +1961,41 @@
     }
 
     /**
+     * Create the Properties object from a map - masking out system properties
+     * that are not intended for public access.
+     */
+    private static Properties createProperties(Map<String, String> initialProps) {
+        Properties properties = new Properties(initialProps.size());
+        for (var entry : initialProps.entrySet()) {
+            String prop = entry.getKey();
+            switch (prop) {
+                // Do not add private system properties to the Properties
+                case "sun.nio.MaxDirectMemorySize":
+                case "sun.nio.PageAlignDirectMemory":
+                    // used by java.lang.Integer.IntegerCache
+                case "java.lang.Integer.IntegerCache.high":
+                    // used by sun.launcher.LauncherHelper
+                case "sun.java.launcher.diag":
+                    // used by jdk.internal.loader.ClassLoaders
+                case "jdk.boot.class.path.append":
+                    break;
+                default:
+                    properties.put(prop, entry.getValue());
+            }
+        }
+        return properties;
+    }
+
+    /**
      * Initialize the system class.  Called after thread initialization.
      */
     private static void initPhase1() {
-
         // VM might invoke JNU_NewStringPlatform() to set those encoding
         // sensitive properties (user.home, user.name, boot.class.path, etc.)
         // during "props" initialization.
         // The charset is initialized in System.c and does not depend on the Properties.
-        props = SystemProps.initProperties();
-        VersionProps.init(props);
-        StaticProperty.javaHome();          // Load StaticProperty to cache the property values
+        Map<String, String> tempProps = SystemProps.initProperties();
+        VersionProps.init(tempProps);
 
         // There are certain system configurations that may be controlled by
         // VM options such as the maximum amount of direct memory and
@@ -1978,15 +2003,14 @@
         // of autoboxing.  Typically, the library will obtain these values
         // from the properties set by the VM.  If the properties are for
         // internal implementation use only, these properties should be
-        // removed from the system properties.
-        //
-        // See java.lang.Integer.IntegerCache and the
-        // VM.saveAndRemoveProperties method for example.
+        // masked from the system properties.
         //
         // Save a private copy of the system properties object that
-        // can only be accessed by the internal implementation.  Remove
-        // certain system properties that are not intended for public access.
-        VM.saveAndRemoveProperties(props);
+        // can only be accessed by the internal implementation.
+        VM.saveProperties(tempProps);
+        props = createProperties(tempProps);
+
+        StaticProperty.javaHome();          // Load StaticProperty to cache the property values
 
         lineSeparator = props.getProperty("line.separator");