Java Color to Hex toHexString(Color col)

Description

converts Color to hex String with RGB values

License

Open Source License

Parameter

Parameter	Description
Color	a parameter

Declaration

final public static String toHexString(Color col) 

Method Source Code

//package com.java2s;
/* //from w ww.j  a  v a  2s . co  m
 GeoGebra - Dynamic Mathematics for Everyone
 http://www.geogebra.org
    
 This file is part of GeoGebra.
    
 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.
     
 */

import java.awt.Color;

public class Main {
    private static StringBuilder hexSB = null;
    private static char[] hexChar = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E',
            'F' };

    /**
     * converts Color to hex String with RGB values
     * @param Color
     * @return
     */
    final public static String toHexString(Color col) {
        byte r = (byte) col.getRed();
        byte g = (byte) col.getGreen();
        byte b = (byte) col.getBlue();

        if (hexSB == null)
            hexSB = new StringBuilder(8);
        else
            hexSB.setLength(0);
        // RED      
        hexSB.append(hexChar[(r & 0xf0) >>> 4]);
        // look up high nibble char             
        hexSB.append(hexChar[r & 0x0f]); // look up low nibble char
        // GREEN
        hexSB.append(hexChar[(g & 0xf0) >>> 4]);
        // look up high nibble char             
        hexSB.append(hexChar[g & 0x0f]); // look up low nibble char
        // BLUE     
        hexSB.append(hexChar[(b & 0xf0) >>> 4]);
        // look up high nibble char             
        hexSB.append(hexChar[b & 0x0f]); // look up low nibble char
        return hexSB.toString();
    }

    final public static String toHexString(char c) {
        int i = c + 0;

        if (hexSB == null)
            hexSB = new StringBuilder(8);
        else
            hexSB.setLength(0);
        hexSB.append("\\u");
        hexSB.append(hexChar[(i & 0xf000) >>> 12]);
        hexSB.append(hexChar[(i & 0x0f00) >> 8]); // look up low nibble char
        hexSB.append(hexChar[(i & 0xf0) >>> 4]);
        hexSB.append(hexChar[i & 0x0f]); // look up low nibble char
        return hexSB.toString();
    }

    final public static String toHexString(String s) {
        StringBuilder sb = new StringBuilder(s.length() * 6);
        for (int i = 0; i < s.length(); i++) {
            sb.append(toHexString(s.charAt(i)));
        }

        return sb.toString();
    }
}

Related

1. toHexColor(Color col)
2. toHexColor(final Color color)
3. toHexColor(final Color color)
4. toHexString(Color c)
5. toHexString(Color col)
6. toHexString(Color color)
7. toHexString(Color color)
8. toHexString(Color color)
9. toHexString(Color color)