src/java.desktop/share/classes/java/awt/PrintJob.java - master - githubmirror/galahad

src/java.desktop/share/classes/java/awt/PrintJob.java
102 строки3 KB
Phil Race
8368576: PrintJob.getGraphics() does not specify behavior after PrintJob.end()
05 ноя 2025, 21:55
05 ноя 2025, 21:555a37374
/*
 * Copyright (c) 1996, 2020, 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 java.awt;

/**
 * An abstract class which initiates and executes a print job.
 * It provides access to a print graphics object which renders
 * to an appropriate print device.
 *
 * @see Toolkit#getPrintJob
 *
 * @author      Amy Fowler
 */
public abstract class PrintJob {

    /**
     * Constructor for subclasses to call.
     */
    protected PrintJob() {}

    /**
     * Gets a Graphics object that will draw to the next page.
     * The page is sent to the printer when the graphics
     * object is disposed.  This graphics object will also implement
     * the PrintGraphics interface.
     * If {@code PrintJob.end()} has been called, this method will
     * return {@code null}.
     * @see PrintGraphics
     * @return the graphics context for printing the next page
     */
    public abstract Graphics getGraphics();

    /**
     * Returns the dimensions of the page in pixels.
     * The resolution of the page is chosen so that it
     * is similar to the screen resolution.
     *
     * @return the page dimension
     */
    public abstract Dimension getPageDimension();

    /**
     * Returns the resolution of the page in pixels per inch.
     * Note that this doesn't have to correspond to the physical
     * resolution of the printer.
     *
     * @return the page resolution
     */
    public abstract int getPageResolution();

    /**
     * Returns true if the last page will be printed first.
     *
     * @return {@code true} if the last page will be printed first;
     *         otherwise {@code false}
     */
    public abstract boolean lastPageFirst();

    /**
     * Ends the print job and does any necessary cleanup.
     */
    public abstract void end();

    /**
     * Ends this print job once it is no longer referenced.
     *
     * @deprecated Finalization has been deprecated for removal.  See
     * {@link java.lang.Object#finalize} for background information and details
     * about migration options.
     *
     * @see #end
     */
    @Deprecated(since="9", forRemoval=true)
    @SuppressWarnings("removal")
    public void finalize() {
        end();
    }

}