JDK14/Java14源码在线阅读

/*
 * Copyright (c) 1997, 2008, 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 java.awt.dnd;

import java.util.EventObject;
import java.awt.dnd.DropTargetContext;

/**
 * The {@code DropTargetEvent} is the base
 * class for both the {@code DropTargetDragEvent}
 * and the {@code DropTargetDropEvent}.
 * It encapsulates the current state of the Drag and
 * Drop operations, in particular the current
 * {@code DropTargetContext}.
 *
 * @since 1.2
 *
 */

public class DropTargetEvent extends java.util.EventObject {

    private static final long serialVersionUID = 2821229066521922993L;

    /**
     * Construct a {@code DropTargetEvent} object with
     * the specified {@code DropTargetContext}.
     *
     * @param dtc The {@code DropTargetContext}
     * @throws NullPointerException if {@code dtc} equals {@code null}.
     * @see #getSource()
     * @see #getDropTargetContext()
     */

    public DropTargetEvent(DropTargetContext dtc) {
        super(dtc.getDropTarget());

        context  = dtc;
    }

    /**
     * This method returns the {@code DropTargetContext}
     * associated with this {@code DropTargetEvent}.
     *
     * @return the {@code DropTargetContext}
     */


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