JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2000, 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
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 */

package sun.java2d;

import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.util.Locale;

/**
 * Headless decorator implementation of a SunGraphicsEnvironment
 */
public final class HeadlessGraphicsEnvironment extends GraphicsEnvironment {

    private GraphicsEnvironment ge;

    public HeadlessGraphicsEnvironment(GraphicsEnvironment ge) {
        this.ge = ge;
    }

    @Override
    public GraphicsDevice[] getScreenDevices()
        throws HeadlessException {
        throw new HeadlessException();
    }

    @Override
    public GraphicsDevice getDefaultScreenDevice()
        throws HeadlessException {
        throw new HeadlessException();
    }

    @Override
    public Point getCenterPoint() throws HeadlessException {
        throw new HeadlessException();
    }

    @Override
    public Rectangle getMaximumWindowBounds() throws HeadlessException {
        throw new HeadlessException();
    }

    @Override
    public Graphics2D createGraphics(BufferedImage img) {
        return ge.createGraphics(img); }

    @Override

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