java.awt.ItemSelectable.java Source code

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Here is the source code for java.awt.ItemSelectable.java

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/*
 * Copyright (c) 1996, 2014, 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;

import java.awt.event.*;

/**
 * The interface for objects which contain a set of items for
 * which zero or more can be selected.
 *
 * @author Amy Fowler
 */

public interface ItemSelectable {

    /**
     * Returns the selected items or {@code null} if no
     * items are selected.
     *
     * @return the list of selected objects, or {@code null}
     */
    public Object[] getSelectedObjects();

    /**
     * Adds a listener to receive item events when the state of an item is
     * changed by the user. Item events are not sent when an item's
     * state is set programmatically.  If {@code l} is
     * {@code null}, no exception is thrown and no action is performed.
     *
     * @param    l the listener to receive events
     * @see ItemEvent
     */
    public void addItemListener(ItemListener l);

    /**
     * Removes an item listener.
     * If {@code l} is {@code null},
     * no exception is thrown and no action is performed.
     *
     * @param   l the listener being removed
     * @see ItemEvent
     */
    public void removeItemListener(ItemListener l);
}