src/java.desktop/share/classes/java/awt/desktop/AppEvent.java - master - githubmirror/jdk22

src/java.desktop/share/classes/java/awt/desktop/AppEvent.java

73 строки2 KB

Per Minborg

8297210: Add a @sealedGraph tag to selected java.desktop classes

30 ноя 2022, 00:51

30 ноя 2022, 00:51f4063a3

/*
 * Copyright (c) 2016, 2021, 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.desktop;

import java.awt.Desktop;
import java.awt.GraphicsEnvironment;
import java.awt.HeadlessException;
import java.io.Serial;
import java.util.EventObject;

/**
 * AppEvents are sent to listeners and handlers installed on the
 * {@link java.awt.Desktop} instance of the current desktop context.
 *
 * @since 9
 * @sealedGraph
 */
public sealed class AppEvent extends EventObject
    permits AboutEvent,
            AppForegroundEvent,
            AppHiddenEvent,
            AppReopenedEvent,
            FilesEvent,
            OpenURIEvent,
            PreferencesEvent,
            QuitEvent,
            ScreenSleepEvent,
            SystemSleepEvent,
            UserSessionEvent {

    /**
     * Use serialVersionUID from JDK 9 for interoperability.
     */
    @Serial
    private static final long serialVersionUID = -5958503993556009432L;

    /**
     * Constructs an {@code AppEvent}.
     *
     * @throws HeadlessException if {@link GraphicsEnvironment#isHeadless()}
     *         returns {@code true}
     * @throws UnsupportedOperationException if Desktop API is not supported on
     *         the current platform
     * @see Desktop#isDesktopSupported()
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    AppEvent() {
        super(Desktop.getDesktop());
    }
}