Here you can find the source of toHex(int r, int g, int b)
| Parameter | Description |
|---|---|
| r | red |
| g | green |
| b | blue |
public static String toHex(int r, int g, int b)
//package com.java2s; /*//w ww .j a va 2 s .co m * SLD Editor - The Open Source Java SLD Editor * * Copyright (C) 2016, SCISYS UK Limited * * 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 3 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, see <http://www.gnu.org/licenses/>. */ public class Main { /** * Returns a web browser-friendly HEX value representing the colour in the default sRGB * ColorModel. * <p>Returns null if r,g,b and inputs are not in the range 0-255. * * @param r red * @param g green * @param b blue * @return a browser-friendly HEX value */ public static String toHex(int r, int g, int b) { if ((r >= 0) && (r <= 255) && (g >= 0) && (g <= 255) && (b >= 0) && (b <= 255)) { return "#" + toBrowserHexValue(r) + toBrowserHexValue(g) + toBrowserHexValue(b); } else { return null; } } /** * To browser hex value. * * @param number the number * @return the string */ private static String toBrowserHexValue(int number) { StringBuilder builder = new StringBuilder(Integer.toHexString(number & 0xff)); while (builder.length() < 2) { builder.insert(0, "0"); } return builder.toString().toUpperCase(); } }