--- /dev/null	2016-02-02 15:15:42.000000000 +0300
+++ new/test/java/awt/Focus/Cause/FocusCauseTest.java	2016-02-02 15:15:42.039710300 +0300
@@ -0,0 +1,225 @@
+/*
+ * 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.
+ */
+
+/*
+  @test
+  @bug 8080395
+  @summary
+  @author    Semyon Sadetsky
+  @run       main FocusCauseTest
+*/
+
+
+import java.awt.*;
+import java.awt.event.FocusEvent.Cause;
+import java.awt.event.FocusEvent;
+import java.awt.event.FocusListener;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.lang.IllegalArgumentException;
+import java.lang.Override;
+import java.lang.RuntimeException;
+import java.util.Arrays;
+
+public class FocusCauseTest {
+
+    private static Cause[] causes1 = {Cause.ACTIVATION,
+            Cause.UNKNOWN, Cause.UNKNOWN, Cause.TRAVERSAL_FORWARD,
+            Cause.TRAVERSAL_FORWARD, Cause.TRAVERSAL_BACKWARD,
+            Cause.TRAVERSAL_BACKWARD, Cause.TRAVERSAL_UP,
+            Cause.TRAVERSAL_DOWN, Cause.CLEAR_GLOBAL_FOCUS_OWNER};
+    private static Cause[] causes2 = new Cause[10];
+    private static int cnt;
+
+    static byte[] data =
+            {-84, -19, 0, 5, 115, 114, 0, 24, 115, 117, 110, 46, 97, 119,
+            116, 46, 67, 97, 117, 115, 101, 100, 70, 111, 99, 117, 115, 69, 118,
+            101, 110, 116, -51, 98, 39, -75, 86, 52, 107, 30, 2, 0, 1, 76, 0, 5,
+            99, 97, 117, 115, 101, 116, 0, 32, 76, 115, 117, 110, 47, 97, 119,
+            116, 47, 67, 97, 117, 115, 101, 100, 70, 111, 99, 117, 115, 69, 118,
+            101, 110, 116, 36, 67, 97, 117, 115, 101, 59, 120, 114, 0, 25, 106,
+            97, 118, 97, 46, 97, 119, 116, 46, 101, 118, 101, 110, 116, 46, 70,
+            111, 99, 117, 115, 69, 118, 101, 110, 116, 7, 68, -65, 75, 55, -113,
+            98, -52, 2, 0, 1, 90, 0, 9, 116, 101, 109, 112, 111, 114, 97, 114,
+            121, 120, 114, 0, 29, 106, 97, 118, 97, 46, 97, 119, 116, 46, 101,
+            118, 101, 110, 116, 46, 67, 111, 109, 112, 111, 110, 101, 110, 116,
+            69, 118, 101, 110, 116, 112, 109, -6, -107, 79, -87, -38, 69, 2, 0,
+            0, 120, 114, 0, 17, 106, 97, 118, 97, 46, 97, 119, 116, 46, 65, 87,
+            84, 69, 118, 101, 110, 116, -26, -85, 45, -31, 24, -33, -118, -61,
+            2, 0, 3, 90, 0, 8, 99, 111, 110, 115, 117, 109, 101, 100, 73, 0, 2,
+            105, 100, 91, 0, 5, 98, 100, 97, 116, 97, 116, 0, 2, 91, 66, 120,
+            114, 0, 21, 106, 97, 118, 97, 46, 117, 116, 105, 108, 46, 69, 118,
+            101, 110, 116, 79, 98, 106, 101, 99, 116, 76, -115, 9, 78, 24, 109,
+            125, -88, 2, 0, 0, 120, 112, 0, 0, 0, 3, -20, 112, 0, 126, 114, 0,
+            30, 115, 117, 110, 46, 97, 119, 116, 46, 67, 97, 117, 115, 101, 100,
+            70, 111, 99, 117, 115, 69, 118, 101, 110, 116, 36, 67, 97, 117, 115,
+            101, 0, 0, 0, 0, 0, 0, 0, 0, 18, 0, 0, 120, 114, 0, 14, 106, 97,
+            118, 97, 46, 108, 97, 110, 103, 46, 69, 110, 117, 109, 0, 0, 0, 0,
+            0, 0, 0, 0, 18, 0, 0, 120, 112, 116, 0};
+
+    static byte[] dataOld =
+            {-84, -19, 0, 5, 115, 114, 0, 25, 106, 97, 118, 97, 46, 97, 119,
+            116, 46, 101, 118, 101, 110, 116, 46, 70, 111, 99, 117, 115, 69,
+            118, 101, 110, 116, 7, 68, -65, 75, 55, -113, 98, -52, 2, 0, 1, 90,
+            0, 9, 116, 101, 109, 112, 111, 114, 97, 114, 121, 120, 114, 0, 29,
+            106, 97, 118, 97, 46, 97, 119, 116, 46, 101, 118, 101, 110, 116, 46,
+            67, 111, 109, 112, 111, 110, 101, 110, 116, 69, 118, 101, 110, 116,
+            112, 109, -6, -107, 79, -87, -38, 69, 2, 0, 0, 120, 114, 0, 17, 106,
+            97, 118, 97, 46, 97, 119, 116, 46, 65, 87, 84, 69, 118, 101, 110,
+            116, -26, -85, 45, -31, 24, -33, -118, -61, 2, 0, 3, 90, 0, 8, 99,
+            111, 110, 115, 117, 109, 101, 100, 73, 0, 2, 105, 100, 91, 0, 5, 98,
+            100, 97, 116, 97, 116, 0, 2, 91, 66, 120, 114, 0, 21, 106, 97, 118,
+            97, 46, 117, 116, 105, 108, 46, 69, 118, 101, 110, 116, 79, 98, 106,
+            101, 99, 116, 76, -115, 9, 78, 24, 109, 125, -88, 2, 0, 0, 120, 112,
+            0, 0, 0, 0, 100, 112, 0};
+
+    static String[] causesIn = {"UNKNOWN", "MOUSE_EVENT", "TRAVERSAL",
+            "TRAVERSAL_UP", "TRAVERSAL_DOWN", "TRAVERSAL_FORWARD",
+            "TRAVERSAL_BACKWARD", "MANUAL_REQUEST", "AUTOMATIC_TRAVERSE"
+            ,"ROLLBACK", "NATIVE_SYSTEM", "ACTIVATION",
+            "CLEAR_GLOBAL_FOCUS_OWNER", "RETARGETED"};
+
+    static FocusEvent.Cause[] causesOut = {FocusEvent.Cause.UNKNOWN,
+            FocusEvent.Cause.MOUSE_EVENT,
+            FocusEvent.Cause.TRAVERSAL, FocusEvent.Cause.TRAVERSAL_UP,
+            FocusEvent.Cause.TRAVERSAL_DOWN, FocusEvent.Cause.TRAVERSAL_FORWARD,
+            FocusEvent.Cause.TRAVERSAL_BACKWARD, FocusEvent.Cause.UNKNOWN,
+            FocusEvent.Cause.UNKNOWN, FocusEvent.Cause.ROLLBACK,
+            FocusEvent.Cause.UNEXPECTED, FocusEvent.Cause.ACTIVATION,
+            FocusEvent.Cause.CLEAR_GLOBAL_FOCUS_OWNER, FocusEvent.Cause.UNKNOWN
+    };
+
+    public static void main(String[] args) throws Exception {
+        testCauses();
+        testNullCause();
+        testCausedFocusEventDeserialization();
+        testFocusEventDeserialization();
+        System.out.println("ok");
+    }
+
+    private static void testNullCause() {
+        try {
+            new FocusEvent(new Frame(), FocusEvent.FOCUS_GAINED, true,
+                    null, null);
+            throw new RuntimeException("Exception is not thrown when the " +
+                    "cause is null");
+        } catch (IllegalArgumentException e) {
+        }
+    }
+
+    private static void testCauses() throws Exception {
+        cnt = 0;
+        Frame frame = new Frame();
+        TextField comp1 = new TextField();
+        comp1.addFocusListener(new FocusListener() {
+            @Override
+            public void focusGained(FocusEvent e) {
+                System.out.println(e.getCause());
+                causes2[cnt++] = e.getCause();
+            }
+
+            @Override
+            public void focusLost(FocusEvent e) {
+                System.out.println(e.getCause());
+                causes2[cnt++] = e.getCause();
+            }
+        });
+        TextField comp2 = new TextField();
+        comp2.addFocusListener(new FocusListener() {
+            @Override
+            public void focusGained(FocusEvent e) {
+                System.out.println(e.getCause());
+                causes2[cnt++] = e.getCause();
+            }
+
+            @Override
+            public void focusLost(FocusEvent e) {
+                System.out.println(e.getCause());
+                causes2[cnt++] = e.getCause();
+            }
+        });
+        frame.add(comp1, BorderLayout.NORTH);
+        frame.add(comp2, BorderLayout.SOUTH);
+        frame.setVisible(true);
+
+        Robot robot = new Robot();
+        robot.delay(200);
+        robot.waitForIdle();
+        comp2.requestFocus();
+        robot.waitForIdle();
+        comp2.transferFocus();
+        robot.waitForIdle();
+        comp1.transferFocusBackward();
+        robot.waitForIdle();
+        comp2.transferFocusUpCycle();
+        robot.waitForIdle();
+        frame.transferFocusDownCycle();
+        robot.waitForIdle();
+        frame.dispose();
+        robot.waitForIdle();
+        if (!Arrays.equals(causes1, causes2)) {
+            throw new RuntimeException("wrong cause " + causes2);
+        }
+    }
+
+    private static void  testCausedFocusEventDeserialization() throws
+            Exception {
+        for (int i = 0; i < causesIn.length; i++) {
+            final String causeIn = causesIn[i];
+            ObjectInputStream oi = new ObjectInputStream(new InputStream() {
+                int cnt = 0;
+                @Override
+                public int read() throws IOException {
+                    if(cnt < data.length) {
+                        return data[cnt++];
+                    } else if(cnt == data.length){
+                        cnt++;
+                        return causeIn.length();
+                    } else if(cnt - data.length - 1 < causeIn.length()) {
+                        return causeIn.getBytes()[cnt++ - data.length - 1];
+                    }
+                    return -1;
+                }
+            });
+            FocusEvent ev = (FocusEvent) oi.readObject();
+            System.out.println(ev);
+            if(ev.getCause() != causesOut[i]) {
+                throw new RuntimeException("Wrong cause read :" +ev.getCause());
+            }
+        }
+    }
+
+    private static void testFocusEventDeserialization() throws
+            Exception {
+        ObjectInputStream oi = new ObjectInputStream(
+                new ByteArrayInputStream(dataOld));
+        FocusEvent ev = (FocusEvent)oi.readObject();
+        if(ev.getCause() != FocusEvent.Cause.UNKNOWN) {
+            throw new RuntimeException("Wrong cause in deserialized FocusEvent "
+                    + ev.getCause());
+        }
+    }
+
+}