mathtools.java

化学图形处理软件

/* $RCSfile$
 * $Author: kaihartmann $
 * $Date: 2007-01-14 18:07:55 +0100 (Sun, 14 Jan 2007) $
 * $Revision: 7717 $
 *
 * Copyright (C) 1997-2007  The Chemistry Development Kit (CDK) project
 *
 * Contact: [e-mail]
 *
 * This program 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 program 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 program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 */
package org.openscience.cdk.math;

/**
 * Class providing convenience methods for simple mathematical operations.
 *
 * @cdk.module standard
 */
public class MathTools {
	
	/**
	 * Analog of Math.max that returns the largest double value in an array of dpubles.
	 *
	 * @param   values  the values to be searched for the largest value among them
	 * @return   the largest value among a set of given values  
	 */
	public static double max(double[] values)
	{
		double max = values[0];
		for (int f = 0; f < values.length; f++)
			if (values[f] > max)
				max = values[f];
			return max;
	}

	/**
	 * Analog of Math.min that returns the largest double value in an array of double.
	 *
	 * @param   values  the values to be searched for the smallest value among them
	 * @return   the smallest value among a set of given values  
	 */
	public static double min(double[] values)
	{
		double min = values[0];
		for (int f = 0; f < values.length; f++)
			if (values[f] < min)
				min = values[f];
			return min;
	}
	
	/**
	 * Analog of Math.max that returns the largest int value in an array of ints
	 **/
	public static int max(int[] values)
	{
		int max = values[0];
		for (int f = 0; f < values.length; f++)
		{
			if (values[f] > max)
			{
				max = values[f];
			}
		}
		return max;
	}

	/**
	 * Analog of Math.max that returns the largest int value in an array of ints
	 **/
	public static int min(int[] values)
	{
		int min = values[0];
		for (int f = 0; f < values.length; f++)
		{
			if (values[f] < min)
			{
				min = values[f];
			}
		}
		return min;
	}
    
    public static boolean isOdd(int intValue) {
        return !MathTools.isEven(intValue);
    }
    
    public static boolean isEven(int intValue) {
        if (Math.floor((double)intValue/2.0)*2.0 == (double)intValue) {
            return true;
        }
        return false;
    }
    
}