--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/unix/classes/sun/awt/PlatformGraphicsInfo.java	Mon Apr 29 10:16:58 2019 -0700
@@ -0,0 +1,63 @@
+/*
+ * 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package sun.awt;
+
+import java.awt.GraphicsEnvironment;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+public class PlatformGraphicsInfo {
+
+    public static GraphicsEnvironment createGE() {
+        return new X11GraphicsEnvironment();
+    }
+
+    /**
+      * Called from java.awt.GraphicsEnvironment when
+      * to check if on this platform, the JDK should default to
+      * headless mode, in the case the application did specify
+      * a value for the java.awt.headless system property.
+      */
+    public static boolean getDefaultHeadlessProperty() {
+        return
+            AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> {
+
+               final String display = System.getenv("DISPLAY");
+               return  display == null || display.trim().isEmpty();
+            });
+    }
+
+    /**
+      * Called from java.awt.GraphicsEnvironment when
+      * getDefaultHeadlessProperty() has returned true, and
+      * the application has called an API that requires headful.
+      */
+    public static String getDefaultHeadlessMessage() {
+        return
+            "\nNo X11 DISPLAY variable was set,\n" +
+            "but this program performed an operation which requires it.";
+    }
+}