--- a/src/share/classes/sun/misc/ProxyGenerator.java	Mon May 13 13:48:58 2013 -0700
+++ b/src/share/classes/sun/misc/ProxyGenerator.java	Thu Oct 09 10:24:25 2014 +0400
@@ -27,11 +27,15 @@
 
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
+import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 import java.lang.reflect.Array;
 import java.lang.reflect.Method;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedList;
@@ -327,10 +331,16 @@
             new java.security.PrivilegedAction<Void>() {
                 public Void run() {
                     try {
-                        FileOutputStream file =
-                            new FileOutputStream(dotToSlash(name) + ".class");
-                        file.write(classFile);
-                        file.close();
+                        int i = name.lastIndexOf('.');
+                        Path path;
+                        if (i > 0) {
+                            Path dir = Paths.get(name.substring(0, i).replace('.', File.separatorChar));
+                            Files.createDirectories(dir);
+                            path = dir.resolve(name.substring(i+1, name.length()) + ".class");
+                        } else {
+                            path = Paths.get(name + ".class");
+                        }
+                        Files.write(path, classFile);
                         return null;
                     } catch (IOException e) {
                         throw new InternalError(

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/sun/misc/ProxyGenerator/SaveProxyClassFileTest.java	Thu Oct 09 10:24:25 2014 +0400
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2014, 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.
+ *
+ * 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.
+ */
+
+/* @test
+ * @bug 8059563
+ * @summary ProxyGenerator should create intermediate directories
+ *          for the generated class file
+ * @build SaveProxyClassFileTest
+ * @run main/othervm -Dsun.misc.ProxyGenerator.saveGeneratedFiles=true SaveProxyClassFileTest
+ */
+
+import java.io.File;
+import sun.misc.ProxyGenerator;
+
+public class SaveProxyClassFileTest {
+
+    static final File dir1 = new File("a");
+    static final File dir2 = new File(dir1, "b");
+    static final File cf = new File(dir2, "c.class");
+
+    public static void main(String[] args) throws Throwable {
+        // remove the files in case they were left from
+        // the previous run
+        deleteFiles();
+
+        try {
+            ProxyGenerator.generateProxyClass("a.b.c",
+                    new Class[] {Inf.class});
+
+            if (!cf.exists()) {
+                throw new RuntimeException(cf + " wasn't created");
+            }
+        } finally {
+            deleteFiles();
+        }
+    }
+
+    static interface Inf {
+    }
+
+    /**
+     * Removes generated file and directories
+     */
+    private static void deleteFiles() {
+        cf.delete();
+        dir2.delete();
+        dir1.delete();
+    }
+}