Java Color to HTML toHtmlColor(Color color)

Description

Converts an integer to an HTML color representation.

License

Open Source License

Parameter

Parameter	Description
color	the color to convert.

Return

the converted string.

Declaration

public static String toHtmlColor(Color color) 

Method Source Code

//package com.java2s;
/**//from   ww  w . java  2  s.  c o m
 * This file is part of emf2gv : an eclipse plugin that allows to
 * generate a graphical representation of an EMF model.
 *
 * Copyright 2010-2011 Jean-Francois Brazeau
 * 
 * emf2gv is free software: you can redistribute it and/or modify
 * it under the terms of either:
 * 
 *      a) the GNU Lesser General Public License as published by
 *       the Free Software Foundation, either version 3 of the License, or
 *       (at your option) any later version.
 *  or
 *      b) the Eclipse Public License version 1.0 as published by
 *       the Eclipse Foundation.
 * 
 * emf2gv 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 emf2gv.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * You should have received a copy of the  Eclipse Public License
 * along with emf2gv.  If not, see <http://www.eclipse.org/legal/epl-v10.html>.
 */

import java.awt.Color;

public class Main {
    /** Hex characters */
    private static final char[] c = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C',
            'D', 'E', 'F' };

    /**
     * Converts an integer to an HTML color representation.
     * 
     * @param color
     *            the color to convert.
     * @return the converted string.
     */
    public static String toHtmlColor(Color color) {
        String result = null;
        if (color != null) {
            char[] cars = new char[7];
            cars[0] = '#';
            toHex((byte) color.getRed(), cars, 1); // RED
            toHex((byte) color.getGreen(), cars, 3); // GREEN
            toHex((byte) color.getBlue(), cars, 5); // BLUE
            return new String(cars);
        } else {
            result = "#000000";
        }
        return result;
    }

    /**
     * Converts a byte value to hexadecimal and put the result in an array.
     * 
     * @param b
     *            the byte value to convert.
     * @param charArray
     *            the array in which the result is put.
     * @param from
     *            the array's index to use as a starting point.
     */
    private static void toHex(byte b, char[] charArray, int from) {
        charArray[from] = c[(b >> 4) & 0x0F];
        charArray[from + 1] = c[b & 0x0F];
    }
}

Related

1. colourToHtmlString(Color colour)
2. covertToHtmlColor(Color color)
3. toHTMLColor(Color c)
4. toHTMLColor(Color c)
5. toHtmlColor(Color color)
6. toHtmlHex(Color color)
7. toHtmlRGB(Color col)
8. toHtmlString(Color color)