通过RGB颜色得到十六进制的颜色值
没有验证越界。代码如下：
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public class Util {/** * 通过RGB颜色得到十六进制的颜色 * @param r 0-255 * @param g 0-255 * @param b 0-255 * @return 255,0,253返回FF00FD */public static String getColorInHexFromRGB(int r,int g,int b){return vali(getHexNum(r))+vali(getHexNum(g))+vali(getHexNum(b));}private static String vali(String s){if (s.length()<2) {s="0"+s;}return s;}private static String getHexNum(int num){int result=num/16;int mod=num%16;StringBuilder s=new StringBuilder();hexHelp(result, mod, s);return s.toString();}private static void hexHelp(int result,int mod,StringBuilder s){char[] H={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};if (result>0) {hexHelp(result/16, result%16, s);}s.append(H[mod]);}public static void main(String [] a){System.out.println(getColorInHexFromRGB(255,254,253));System.out.println(getColorInHexFromRGB(255,0,253));}}