/* * Copyright (c) 1997, 2006, 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 javax.swing.event; import java.util.EventObject;import javax.swing.*;  /** * An event that characterizes a change in selection. The change is limited to a * a single inclusive interval. The selection of at least one index within the * range will have changed. A decent {@code ListSelectionModel} implementation * will keep the range as small as possible. {@code ListSelectionListeners} will * generally query the source of the event for the new selected status of each * potentially changed row. * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing.  As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @author Hans Muller * @author Ray Ryan * @see ListSelectionModel */public class ListSelectionEvent extends EventObject{    private int firstIndex;    private int lastIndex;    private boolean isAdjusting;     /**     * Represents a change in selection status between {@code firstIndex} and     * {@code lastIndex}, inclusive. {@code firstIndex} is less than or equal to     * {@code lastIndex}. The selection of at least one index within the range will     * have changed.     *     * @param firstIndex the first index in the range, &lt;= lastIndex     * @param lastIndex the last index in the range, &gt;= firstIndex     * @param isAdjusting whether or not this is one in a series of     *        multiple events, where changes are still being made     */    public ListSelectionEvent(Object source, int firstIndex, int lastIndex,                              boolean isAdjusting)    {        super(source);        this.firstIndex = firstIndex;        this.lastIndex = lastIndex;        this.isAdjusting = isAdjusting;    }     /**     * Returns the index of the first row whose selection may have changed.     * {@code getFirstIndex() &lt;= getLastIndex()}     *     * @return the first row whose selection value may have changed,     *         where zero is the first row     */    public int getFirstIndex() { return firstIndex; }     /**     * Returns the index of the last row whose selection may have changed.     * {@code getLastIndex() &gt;= getFirstIndex()}     *     * @return the last row whose selection value may have changed,     *         where zero is the first row     */    public int getLastIndex() { return lastIndex; }     /**     * Returns whether or not this is one in a series of multiple events,     * where changes are still being made. See the documentation for     * {@link javax.swing.ListSelectionModel#setValueIsAdjusting} for     * more details on how this is used.     *     * @return {@code true} if this is one in a series of multiple events,     *         where changes are still being made     */    public boolean getValueIsAdjusting() { return isAdjusting; }     /**     * Returns a {@code String} that displays and identifies this     * object's properties.     *     * @return a String representation of this object     */    public String toString() {        String properties =            " source=" + getSource() +            " firstIndex= " + firstIndex +            " lastIndex= " + lastIndex +            " isAdjusting= " + isAdjusting +            " ";        return getClass().getName() + "[" + properties + "]";    }}