Translates a "ff0000" html color into an AWT color. - Java 2D Graphics

Java examples for 2D Graphics:Color HTML

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Description

Translates a "ff0000" html color into an AWT color.

Demo Code

/**************************************************************************
 *  Copyright (C) 2013 Atlas of Living Australia
 *  All Rights Reserved.//from  ww w.  jav  a2s.c  o  m
 * 
 *  The contents of this file are subject to the Mozilla Public
 *  License Version 1.1 (the "License"); you may not use this file
 *  except in compliance with the License. You may obtain a copy of
 *  the License at http://www.mozilla.org/MPL/
 * 
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing
 *  rights and limitations under the License.
 ***************************************************************************/
//package com.java2s;
import java.awt.Color;

public class Main {
    public static void main(String[] argv) throws Exception {
        String htmlRGB = "java2s.com";
        float opacity = 2.45678f;
        System.out.println(getColor(htmlRGB, opacity));
    }

    /**
     * Translates a "ff0000" html color into an AWT color.
     * 
     * @param htmlRGB
     * @param opacity
     * @return java.awt.Color
     */
    public static Color getColor(String htmlRGB, Float opacity) {
        if (htmlRGB == null || htmlRGB.length() != 6) {
            throw new IllegalArgumentException(
                    "badly formatted RGB string: " + htmlRGB);
        }

        int red = Integer.parseInt(htmlRGB.substring(0, 2), 16);
        int green = Integer.parseInt(htmlRGB.substring(2, 4), 16);
        int blue = Integer.parseInt(htmlRGB.substring(4), 16);
        int alpha = (int) (255 * opacity);

        Integer colour = (red << 16) | (green << 8) | blue;
        colour = colour | (alpha << 24);
        return new Color(colour, true);
    }
}

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