--- /dev/null	2015-07-25 15:02:20.097409468 -0700
+++ new/test/java/lang/String/CompactString/Trim.java	2015-10-30 14:04:22.190188978 -0700
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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 org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import static org.testng.Assert.assertEquals;
+
+/*
+ * @test
+ * @bug 8077559
+ * @summary Tests Compact String. This one is for String.trim.
+ * @run testng/othervm -XX:+CompactStrings Trim
+ * @run testng/othervm -XX:-CompactStrings Trim
+ */
+
+public class Trim {
+
+    /*
+     * Data provider for testTrim
+     *
+     * @return input parameter for testTrim
+     */
+    @DataProvider
+    public Object[][] trims() {
+        return new Object[][] {
+                { " \t \t".trim(), "" },
+                { "\t \t ".trim(), "" },
+                { "\t A B C\t ".trim(), "A B C" },
+                { " \t A B C \t".trim(), "A B C" },
+                { "\t \uFF21 \uFF22 \uFF23\t ".trim(), "\uFF21 \uFF22 \uFF23" },
+                { " \t \uFF21 \uFF22 \uFF23 \t".trim(), "\uFF21 \uFF22 \uFF23" },
+                { " \t \uFF41 \uFF42 \uFF43 \t".trim(), "\uFF41 \uFF42 \uFF43" },
+                { " \t A\uFF21 B\uFF22 C\uFF23 \t".trim(),
+                        "A\uFF21 B\uFF22 C\uFF23" } };
+    }
+
+    /*
+     * test trim().
+     *
+     * @param res
+     *            real result
+     * @param expected
+     *            expected result
+     */
+    @Test(dataProvider = "trims")
+    public void testTrim(String res, String expected) {
+        assertEquals(res, expected);
+    }
+
+}