Util.java Source code

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Here is the source code for Util.java

Source

/*
 *  SSHTools - Java SSH2 API
 *
 *  Copyright (C) 2002-2003 Lee David Painter and Contributors.
 *
 *  Contributions made by:
 *
 *  Brett Smith
 *  Richard Pernavas
 *  Erwin Bolwidt
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import java.awt.Color;

public class Util {

    /**
     * Return a string representation of a color
     * 
     * @param color
     * @return string representation
     */
    public static String colorToString(Color color) {
        if (color == null) {
            return "";
        }

        StringBuffer buf = new StringBuffer();
        buf.append('#');
        buf.append(numberToPaddedHexString(color.getRed(), 2));
        buf.append(numberToPaddedHexString(color.getGreen(), 2));
        buf.append(numberToPaddedHexString(color.getBlue(), 2));

        return buf.toString();
    }

    /**
     * Convert a number to a zero padded hex string
     * 
     * @param int number
     * @return zero padded hex string
     * @throws IllegalArgumentException
     *             if number takes up more characters than <code>size</code>
     */
    public static String numberToPaddedHexString(int number, int size) {
        String s = Integer.toHexString(number);

        if (s.length() > size) {
            throw new IllegalArgumentException("Number too big for padded hex string");
        }

        StringBuffer buf = new StringBuffer();

        for (int i = 0; i < (size - s.length()); i++) {
            buf.append('0');
        }

        buf.append(s);

        return buf.toString();
    }
}