--- a/jdk/src/java.base/share/classes/java/lang/module/SystemModuleFinder.java	Tue Oct 18 17:15:11 2016 +0530
+++ b/jdk/src/java.base/share/classes/java/lang/module/SystemModuleFinder.java	Tue Oct 18 14:22:16 2016 +0200
@@ -44,6 +44,8 @@
 import jdk.internal.jimage.ImageLocation;
 import jdk.internal.jimage.ImageReader;
 import jdk.internal.jimage.ImageReaderFactory;
+import jdk.internal.misc.JavaNetUriAccess;
+import jdk.internal.misc.SharedSecrets;
 import jdk.internal.module.ModuleHashes;
 import jdk.internal.module.ModuleHashes.HashSupplier;
 import jdk.internal.module.SystemModules;
@@ -71,6 +73,8 @@
     // ImageReader used to access all modules in the image
     private static final ImageReader imageReader;
 
+    private static final JavaNetUriAccess jnua = SharedSecrets.getJavaNetUriAccess();
+
     // the set of modules in the run-time image
     private static final Set<ModuleReference> modules;
 
@@ -166,7 +170,8 @@
                                                      HashSupplier hash)
     {
         String mn = md.name();
-        URI uri = URI.create("jrt:/" + mn);
+
+        URI uri = jnua.create("jrt", "/".concat(mn));
 
         Supplier<ModuleReader> readerSupplier = new Supplier<>() {
             @Override

--- a/jdk/src/java.base/share/classes/java/net/URI.java	Tue Oct 18 17:15:11 2016 +0530
+++ b/jdk/src/java.base/share/classes/java/net/URI.java	Tue Oct 18 14:22:16 2016 +0200
@@ -37,6 +37,9 @@
 import java.nio.charset.CodingErrorAction;
 import java.nio.charset.CharacterCodingException;
 import java.text.Normalizer;
+import jdk.internal.loader.URLClassPath;
+import jdk.internal.misc.JavaNetUriAccess;
+import jdk.internal.misc.SharedSecrets;
 import sun.nio.cs.ThreadLocalCoders;
 
 import java.lang.Character;             // for javadoc
@@ -820,6 +823,25 @@
     }
 
     /**
+     * Constructs a simple URI consisting of only a scheme and a pre-validated
+     * path. Provides a fast-path for some internal cases.
+     */
+    URI(String scheme, String path) {
+        assert validSchemeAndPath(scheme, path);
+        this.scheme = scheme;
+        this.path = path;
+    }
+
+    private static boolean validSchemeAndPath(String scheme, String path) {
+        try {
+            URI u = new URI(scheme + ":" + path);
+            return scheme.equals(u.scheme) && path.equals(u.path);
+        } catch (URISyntaxException e) {
+            return false;
+        }
+    }
+
+    /**
      * Creates a URI by parsing the given string.
      *
      * <p> This convenience factory method works as if by invoking the {@link
@@ -3571,5 +3593,13 @@
         }
 
     }
-
+    static {
+        SharedSecrets.setJavaNetUriAccess(
+            new JavaNetUriAccess() {
+                public URI create(String scheme, String path) {
+                    return new URI(scheme, path);
+                }
+            }
+        );
+    }
 }

--- a/jdk/src/java.base/share/classes/java/net/URLClassLoader.java	Tue Oct 18 17:15:11 2016 +0530
+++ b/jdk/src/java.base/share/classes/java/net/URLClassLoader.java	Tue Oct 18 14:22:16 2016 +0200
@@ -51,8 +51,6 @@
 
 import jdk.internal.loader.Resource;
 import jdk.internal.loader.URLClassPath;
-import jdk.internal.misc.JavaNetAccess;
-import jdk.internal.misc.SharedSecrets;
 import jdk.internal.perf.PerfCounter;
 import sun.net.www.ParseUtil;
 import sun.security.util.SecurityConstants;
@@ -767,13 +765,6 @@
     }
 
     static {
-        SharedSecrets.setJavaNetAccess(
-            new JavaNetAccess() {
-                public URLClassPath getURLClassPath(URLClassLoader u) {
-                    return u.ucp;
-                }
-            }
-        );
         ClassLoader.registerAsParallelCapable();
     }
 }

--- a/jdk/src/java.base/share/classes/jdk/internal/misc/JavaNetAccess.java	Tue Oct 18 17:15:11 2016 +0530
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,36 +0,0 @@
-/*
- * Copyright (c) 2006, 2015, 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
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package jdk.internal.misc;
-
-import java.net.URLClassLoader;
-import jdk.internal.loader.URLClassPath;
-
-public interface JavaNetAccess {
-    /**
-     * return the URLClassPath belonging to the given loader
-     */
-    URLClassPath getURLClassPath (URLClassLoader u);
-}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/jdk/internal/misc/JavaNetUriAccess.java	Tue Oct 18 14:22:16 2016 +0200
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2006, 2016, 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
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.misc;
+
+import java.net.URI;
+
+public interface JavaNetUriAccess {
+    /**
+     * Create a URI of pre-validated scheme and path.
+     */
+    URI create(String scheme, String path);
+}

--- a/jdk/src/java.base/share/classes/jdk/internal/misc/SharedSecrets.java	Tue Oct 18 17:15:11 2016 +0530
+++ b/jdk/src/java.base/share/classes/jdk/internal/misc/SharedSecrets.java	Tue Oct 18 14:22:16 2016 +0200
@@ -53,10 +53,10 @@
     private static JavaLangInvokeAccess javaLangInvokeAccess;
     private static JavaLangRefAccess javaLangRefAccess;
     private static JavaIOAccess javaIOAccess;
-    private static JavaNetAccess javaNetAccess;
     private static JavaNetInetAddressAccess javaNetInetAddressAccess;
     private static JavaNetHttpCookieAccess javaNetHttpCookieAccess;
     private static JavaNetSocketAccess javaNetSocketAccess;
+    private static JavaNetUriAccess javaNetUriAccess;
     private static JavaNioAccess javaNioAccess;
     private static JavaIOFileDescriptorAccess javaIOFileDescriptorAccess;
     private static JavaIOFilePermissionAccess javaIOFilePermissionAccess;
@@ -134,14 +134,14 @@
         return javaLangRefAccess;
     }
 
-    public static void setJavaNetAccess(JavaNetAccess jna) {
-        javaNetAccess = jna;
+    public static void setJavaNetUriAccess(JavaNetUriAccess jnua) {
+        javaNetUriAccess = jnua;
     }
 
-    public static JavaNetAccess getJavaNetAccess() {
-        if (javaNetAccess == null)
-            unsafe.ensureClassInitialized(java.net.URLClassLoader.class);
-        return javaNetAccess;
+    public static JavaNetUriAccess getJavaNetUriAccess() {
+        if (javaNetUriAccess == null)
+            unsafe.ensureClassInitialized(java.net.URI.class);
+        return javaNetUriAccess;
     }
 
     public static void setJavaNetInetAddressAccess(JavaNetInetAddressAccess jna) {