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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package java.awt;
+
+import java.awt.GraphicsDevice;
+import java.awt.HeadlessException;
+
+import org.apache.harmony.awt.gl.CommonGraphicsEnvironment;
+
+/**
+ * The HeadlessGraphicsEnvironment class is the CommonGraphicsEnvironment
+ * implementation to use in the case where the environment lacks display,
+ * keyboard, and mouse support.
+ *
+ * @since Android 1.0
+ */
+public class HeadlessGraphicsEnvironment extends CommonGraphicsEnvironment {
+
+ /**
+ * Returns whether or not a display, keyboard, and mouse are supported in
+ * this graphics environment.
+ *
+ * @return true, if HeadlessException will be thrown from areas of the
+ * graphics environment that are dependent on a display, keyboard,
+ * or mouse, false otherwise.
+ */
+ @Override
+ public boolean isHeadlessInstance() {
+ return true;
+ }
+
+ /**
+ * Gets the default screen device as GraphicDevice object.
+ *
+ * @return the GraphicDevice object which represents default screen device.
+ * @throws HeadlessException
+ * if isHeadless() returns true.
+ */
+ @Override
+ public GraphicsDevice getDefaultScreenDevice() throws HeadlessException {
+ throw new HeadlessException();
+ }
+
+ /**
+ * Gets an array of all available screen devices.
+ *
+ * @return the array of GraphicsDevice objects which represents all
+ * available screen devices.
+ * @throws HeadlessException
+ * if isHeadless() returns true.
+ */
+ @Override
+ public GraphicsDevice[] getScreenDevices() throws HeadlessException {
+ throw new HeadlessException();
+ }
+
+}