--- /dev/null	2019-03-06 11:16:13.000000000 +0530
+++ new/test/jdk/java/awt/keyboard/8218917/AltKeyBug.java	2019-03-06 11:16:13.000000000 +0530
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2019, 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
+ * @key headful
+ * @bug 8218917
+ * @summary Tests whether sending an ALT_GRAPH key once, will result in the
+ * system reporting only ALT_GRAPH even if an ALT was sent and vice versa.
+ * @run main AltKeyBug
+ */
+import javax.swing.JTextField;
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+
+import java.awt.Robot;
+import java.awt.event.KeyListener;
+import java.awt.event.KeyEvent;
+
+public class AltKeyBug {
+    private static JFrame f;
+    private static boolean rightAltPressed = false;
+    private static boolean throwException = false;
+    private static String errorString;
+    public static void main(String[] args) throws Exception {
+        try {
+            Robot robot = new Robot();
+            robot.setAutoDelay(50);
+
+            SwingUtilities.invokeAndWait(() -> {
+                JTextField comp = new JTextField();
+                comp.addKeyListener(new KeyListener() {
+                    @Override public void keyTyped(KeyEvent e) {}
+                    @Override public void keyPressed(KeyEvent e) {
+                        System.out.println("ModEx : " +e.getModifiersEx());
+                        System.out.println("Mod : " +e.getModifiers());
+                        System.out.println("ALT_DOWN : " + e.isAltDown());
+                        System.out.println("ALT_GR_DOWN: " + e.isAltGraphDown());
+                        System.out.println("-----------");
+                        if (rightAltPressed && !e.isAltGraphDown()) {
+                            throwException = true;
+                            errorString = "Right Alt press was sent but not received back.";
+                        } else if (!rightAltPressed && e.isAltGraphDown()) {
+                            throwException = true;
+                            errorString = "Left Alt press was sent, but received Right Alt";
+                        }
+                    }
+                    @Override public void keyReleased(KeyEvent e) {}
+                });
+                f = new JFrame();
+                f.add(comp);
+                f.setSize(100,100);
+                f.setVisible(true);
+            });
+
+            for(int i = 0; i < 20; i++) {
+                rightAltPressed = true;
+                robot.keyPress(KeyEvent.VK_ALT_GRAPH);
+                robot.keyRelease(KeyEvent.VK_ALT_GRAPH);
+
+                robot.waitForIdle();
+
+                if (throwException) {
+                    throw new RuntimeException(errorString);
+                }
+                rightAltPressed = false;
+                robot.keyPress(KeyEvent.VK_ALT);
+                robot.keyRelease(KeyEvent.VK_ALT);
+
+                robot.waitForIdle();
+
+                if (throwException) {
+                    throw new RuntimeException(errorString);
+                }
+            }
+        } finally {
+            SwingUtilities.invokeAndWait(()-> {
+                if (f != null)
+                    f.dispose();
+            });
+        }
+
+        System.out.println("Test passed.");
+    }
+}