6896335: GraphicsEnvironment.getDefaultScreenDevice() throws UnsatisfiedLinkError in headless mode

Summary: Use local ge variable instead of localEnv field in GE.
Reviewed-by: igor, prr

src/share/classes/java/awt/GraphicsEnvironment.java

@@ -110,7 +110,7 @@ public abstract class GraphicsEnvironment {
 //          long t1 = System.currentTimeMillis();
 //          System.out.println("GE creation took " + (t1-t0)+ "ms.");
             if (isHeadless()) {
-                localEnv = new HeadlessGraphicsEnvironment(localEnv);
+                ge = new HeadlessGraphicsEnvironment(ge);
             }
         } catch (ClassNotFoundException e) {
             throw new Error("Could not find class: "+nm);

test/java/awt/GraphicsEnvironment/TestGetDefScreenDevice.java

+/*
+ * Copyright (c) 2010 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6896335
+ * @summary Test GraphicsEnvironment.getDefaultScreenDevice() in headless mode
+ * @run main/othervm -Djava.awt.headless=true TestGetDefScreenDevice
+ */
+
+import java.awt.*;
+public class TestGetDefScreenDevice {
+
+    public static void main(String[] args) throws Exception {
+        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        try {
+            ge.getDefaultScreenDevice();
+            throw new Exception("Failed. HeadlessException not thrown");
+        } catch (HeadlessException he) {
+            // OK, test passed.
+        }
+    }
+}