--- a/langtools/test/tools/sjavac/SJavac.java	Tue Jan 22 19:06:05 2013 -0800
+++ b/langtools/test/tools/sjavac/SJavac.java	Tue Jan 22 19:07:20 2013 -0800
@@ -21,16 +21,6 @@
  * questions.
  */
 
-/*
- * @test
- * @summary Test all aspects of sjavac.
- *
- * @bug 8004658
- * @summary Add internal smart javac wrapper to solve JEP 139
- *
- * @run main SJavac
- */
-
 import java.util.*;
 import java.io.*;
 import java.net.*;
@@ -44,13 +34,6 @@
 class SJavac {
 
     public static void main(String... args) throws Exception {
-        URL url = SJavac.class.getClassLoader().getResource("com/sun/tools/sjavac/Main.class");
-        if (url == null) {
-            // No sjavac in the classpath.
-            System.out.println("pass by default");
-            return;
-        }
-
         SJavac s = new SJavac();
         s.test();
     }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/sjavac/SJavacWrapper.java	Tue Jan 22 19:07:20 2013 -0800
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2013, 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
+ * @summary Test all aspects of sjavac.
+ *
+ * @bug 8004658
+ * @summary Add internal smart javac wrapper to solve JEP 139
+ *
+ * @run main SJavacWrapper
+ */
+
+import java.io.*;
+import java.lang.reflect.Method;
+import java.net.*;
+
+
+public
+class SJavacWrapper {
+
+    public static void main(String... args) throws Exception {
+        URL url = SJavacWrapper.class.getClassLoader().getResource("com/sun/tools/sjavac/Main.class");
+        if (url == null) {
+            // No sjavac in the classpath.
+            System.out.println("sjavac not available: pass by default");
+            return;
+        }
+
+        File testSrc = new File(System.getProperty("test.src"));
+        File sjavac_java = new File(testSrc, "SJavac.java");
+        File testClasses = new File(System.getProperty("test.classes"));
+        File sjavac_class = new File(testClasses, "SJavac.class");
+        if (sjavac_class.lastModified() < sjavac_java.lastModified()) {
+            String[] javac_args = { "-d", testClasses.getPath(), sjavac_java.getPath() };
+            System.err.println("Recompiling SJavac.java");
+            int rc = com.sun.tools.javac.Main.compile(javac_args);
+            if (rc != 0)
+                throw new Exception("compilation failed");
+        }
+
+        Class<?> sjavac = Class.forName("SJavac");
+        Method sjavac_main = sjavac.getMethod("main", String[].class);
+        sjavac_main.invoke(null, new Object[] { args });
+    }
+
+}