Return a string representation of a color

   

/*
 *  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();
  }
}

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Return a string representation of a color : Color « 2D Graphics GUI « Java

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