Mega Code Archive
Compares the initial elements of two arrays
<![CDATA[
import java.util.Arrays;
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -------------------
* ArrayUtilities.java
* -------------------
* (C) Copyright 2003-2005, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: ArrayUtilities.java,v 1.7 2008/09/10 09:21:30 mungady Exp $
*
* Changes
* -------
* 21-Aug-2003 : Version 1 (DG);
* 04-Oct-2004 : Renamed ArrayUtils --> ArrayUtilities (DG);
*
*/
public class Main {
/**
* Compares the initial elements of two arrays.
*
* @param a1 array 1.
* @param a2 array 2.
*
* @return An integer showing the relative ordering.
*/
public static int compareVersionArrays (Comparable[] a1, Comparable[] a2)
{
int length = Math.min (a1.length, a2.length);
for (int i = 0; i < length; i++)
{
Comparable o1 = a1[i];
Comparable o2 = a2[i];
if (o1 == null && o2 == null)
{
// cannot decide ..
continue;
}
if (o1 == null)
{
return 1;
}
if (o2 == null)
{
return -1;
}
int retval = o1.compareTo(o2);
if (retval != 0)
{
return retval;
}
}
return 0;
}
}
]]>