--- /dev/null	2011-04-29 14:48:13.886379711 -0700
+++ new/test/sun/nio/cs/TestStringCodingUTF8.java	2011-05-02 10:42:50.925570759 -0700
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2011, 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 7040220
+   @summary Test if StringCoding and NIO result have the same de/encoding result for UTF-8
+ * @run main/othervm/timeout=2000 TestStringCodingUTF8
+ */
+
+import java.util.*;
+import java.nio.*;
+import java.nio.charset.*;
+
+public class TestStringCodingUTF8 {
+    public static void main(String[] args) throws Throwable {
+        test();
+        // security manager on
+        System.setSecurityManager(new PermissiveSecurityManger());               
+        test();
+    }
+
+    static void test() throws Throwable {
+        Charset cs = Charset.forName("UTF-8");
+        char[] bmp = new char[0x10000];
+        for (int i = 0; i < 0x10000; i++) {
+            bmp[i] = (char)i;
+        }
+        test(cs, bmp, 0, bmp.length);
+
+        ArrayList<Integer> list = new ArrayList<>(0x20000);
+        for (int i = 0; i < 0x20000; i++) {
+            list.add(i, i);
+        }
+        Collections.shuffle(list);
+        int j = 0;
+        char[] bmpsupp = new char[0x30000];
+        for (int i = 0; i < 0x20000; i++) {
+            j += Character.toChars(list.get(i), bmpsupp, j);
+        }
+        assert (j == bmpsupp.length);
+        test(cs, bmpsupp, 0, bmpsupp.length);
+
+        // randomed "off" and "len" on shuffled data
+        Random rnd = new Random();
+        int maxlen = 1000;
+        int itr = 5000;
+        for (int i = 0; i < itr; i++) {
+            int off = rnd.nextInt(bmpsupp.length - maxlen);
+            int len = rnd.nextInt(maxlen);
+            test(cs, bmpsupp, off, len);
+        }
+
+        // random length of bytes, test the edge corner case
+        for (int i = 0; i < itr; i++) {
+            byte[] ba = new byte[rnd.nextInt(maxlen)];
+            rnd.nextBytes(ba);
+            //new String(csn);
+            if (!new String(ba, cs.name()).equals(
+                 new String(decode(cs, ba, 0, ba.length))))
+                throw new RuntimeException("new String(csn) failed");
+            //new String(cs);
+            if (!new String(ba, cs).equals(
+                 new String(decode(cs, ba, 0, ba.length))))
+                throw new RuntimeException("new String(cs) failed");
+        }
+        System.out.println("done!");
+    }
+
+    static void test(Charset cs, char[] ca, int off, int len) throws Throwable {
+        String str = new String(ca, off, len);
+        byte[] ba = encode(cs, ca, off, len);
+
+        //getBytes(csn);
+        byte[] baStr = str.getBytes(cs.name());
+        if (!Arrays.equals(ba, baStr))
+            throw new RuntimeException("getBytes(csn) failed");
+
+        //getBytes(cs);
+        baStr = str.getBytes(cs);
+        if (!Arrays.equals(ba, baStr))
+            throw new RuntimeException("getBytes(cs) failed");
+
+        //new String(csn);
+        if (!new String(ba, cs.name()).equals(new String(decode(cs, ba, 0, ba.length))))
+            throw new RuntimeException("new String(csn) failed");
+
+        //new String(cs);
+        if (!new String(ba, cs).equals(new String(decode(cs, ba, 0, ba.length))))
+            throw new RuntimeException("new String(cs) failed");
+    }
+
+    // copy/paste of the StringCoding.decode()
+    static char[] decode(Charset cs, byte[] ba, int off, int len) {
+        CharsetDecoder cd = cs.newDecoder();
+        int en = (int)(len * cd.maxCharsPerByte());
+        char[] ca = new char[en];
+        if (len == 0)
+            return ca;
+        cd.onMalformedInput(CodingErrorAction.REPLACE)
+          .onUnmappableCharacter(CodingErrorAction.REPLACE)
+          .reset();
+
+        ByteBuffer bb = ByteBuffer.wrap(ba, off, len);
+        CharBuffer cb = CharBuffer.wrap(ca);
+        try {
+            CoderResult cr = cd.decode(bb, cb, true);
+            if (!cr.isUnderflow())
+                cr.throwException();
+            cr = cd.flush(cb);
+            if (!cr.isUnderflow())
+                cr.throwException();
+        } catch (CharacterCodingException x) {
+            throw new Error(x);
+        }
+        return Arrays.copyOf(ca, cb.position());
+    }
+
+    // copy/paste of the StringCoding.encode()
+    static byte[] encode(Charset cs, char[] ca, int off, int len) {
+        CharsetEncoder ce = cs.newEncoder();
+        int en = (int)(len * ce.maxBytesPerChar());
+        byte[] ba = new byte[en];
+        if (len == 0)
+            return ba;
+        ce.onMalformedInput(CodingErrorAction.REPLACE)
+          .onUnmappableCharacter(CodingErrorAction.REPLACE)
+          .reset();
+        ByteBuffer bb = ByteBuffer.wrap(ba);
+        CharBuffer cb = CharBuffer.wrap(ca, off, len);
+        try {
+            CoderResult cr = ce.encode(cb, bb, true);
+            if (!cr.isUnderflow())
+                cr.throwException();
+            cr = ce.flush(bb);
+            if (!cr.isUnderflow())
+                cr.throwException();
+        } catch (CharacterCodingException x) {
+            throw new Error(x);
+        }
+        return Arrays.copyOf(ba, bb.position());
+    }
+
+    static class PermissiveSecurityManger extends SecurityManager {
+        @Override public void checkPermission(java.security.Permission p) {}
+    }
+}