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