--- a/jdk/src/java.management/share/classes/javax/management/loading/MLet.java	Wed Sep 10 19:37:23 2014 -0700
+++ b/jdk/src/java.management/share/classes/javax/management/loading/MLet.java	Thu Sep 11 12:54:02 2014 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 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
@@ -1313,11 +1313,11 @@
         if (type.compareTo("java.lang.Long") == 0)
              return Long.valueOf(param);
         if (type.compareTo("java.lang.Integer") == 0)
-             return param;
+             return Integer.valueOf(param);
         if (type.compareTo("java.lang.Float") == 0)
-             return new Float(param);
+             return Float.valueOf(param);
         if (type.compareTo("java.lang.Double") == 0)
-             return new Double(param);
+             return Double.valueOf(param);
         if (type.compareTo("java.lang.String") == 0)
              return param;
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/management/loading/MLetInternalsTest.java	Thu Sep 11 12:54:02 2014 +0200
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ */
+
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+import javax.management.loading.MLet;
+import org.testng.annotations.Test;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.BeforeTest;
+
+import static org.testng.Assert.*;
+
+/*
+ * @test
+ * @bug 8058089
+ * @summary Tests various internal functions provided by MLet for correctness
+ * @author Jaroslav Bachorik
+ * @run testng MLetInternalsTest
+ */
+public class MLetInternalsTest {
+    private final static String CONSTRUCT_PARAMETER = "constructParameter";
+
+    private final static Map<String, Method> testedMethods = new HashMap<>();
+
+    @BeforeClass
+    public static void setupClass() {
+        testedMethods.clear();
+        try {
+            Method m = MLet.class.getDeclaredMethod(
+                    CONSTRUCT_PARAMETER,
+                    String.class, String.class
+            );
+            m.setAccessible(true);
+
+            testedMethods.put(CONSTRUCT_PARAMETER, m);
+        } catch (Exception ex) {
+            throw new Error(ex);
+        }
+    }
+
+    private MLet mlet;
+
+    @BeforeTest
+    public void setupTest() {
+        mlet = new MLet();
+    }
+
+    @Test
+    public void testConstructParameter() throws Exception {
+        assertEquals(constructParameter("120", "int"), 120);
+        assertEquals(constructParameter("120", "java.lang.Integer"), Integer.valueOf(120));
+        assertEquals(constructParameter("120", "long"), 120L);
+        assertEquals(constructParameter("120", "java.lang.Long"), Long.valueOf(120));
+        assertEquals(constructParameter("120.0", "float"), 120.0f);
+        assertEquals(constructParameter("120.0", "java.lang.Float"), Float.valueOf(120.0f));
+        assertEquals(constructParameter("120.0", "double"), 120.0d);
+        assertEquals(constructParameter("120", "java.lang.Double"), Double.valueOf(120d));
+        assertEquals(constructParameter("120", "java.lang.String"), "120");
+        assertEquals(constructParameter("120", "byte"), (byte)120);
+        assertEquals(constructParameter("120", "java.lang.Byte"), (byte)120);
+        assertEquals(constructParameter("120", "short"), (short)120);
+        assertEquals(constructParameter("120", "java.lang.Short"), (short)120);
+        assertEquals(constructParameter("true", "boolean"), true);
+        assertEquals(constructParameter("true", "java.lang.Boolean"), Boolean.valueOf(true));
+    }
+
+    private Object constructParameter(String param, String type) throws Exception {
+        return testedMethods.get(CONSTRUCT_PARAMETER).invoke(mlet, param, type);
+    }
+}