java - 二进制转十六进制

Question

大家好，我已经实现了一个将值从二进制转换为十六进制的解决方案。所以我想知道是否有比我的更优雅的解决方案(肯定有)。我已经测试了该程序并且它正在工作。这是代码:

public class BinaryToHex
{
    public static void main(String[] args) 
    {
        String binary = "1110001101";
        binaryToHex(binary);
        //38d
    }

    public static void binaryToHex(String binaryValue)
    {
        StringBuilder sb = new StringBuilder(binaryValue);

        System.out.println("Original StringBuilder: " + sb);
        sb.reverse();

        System.out.println("reversed StringBuilder: " + sb);

        int convert = binaryValue.length();
        System.out.println("Legth of the binary: " +  convert);

        if(convert % 4 != 0)
        {
            while(convert % 4 != 0)
            {


                sb.append(0);
                convert ++;

                System.out.println("StringBuilder in loop: " + sb);
                System.out.println("Convert in loop: " + convert);
            }
        }
        sb.reverse();
        System.out.println("Ready StringBuilder for use? " + sb);
        String test = null;
//      String test = sb.toString();
        for(int i=0; i<sb.length(); i ++)
        {
            if(i % 4 == 0)
            {
                test = sb.substring(i, (i+4));
                System.out.print(getChar(test));
            }
        }
    }

    public static String getChar(String num)
    {
        String number = "";
        switch(num)
        {
            case "0000" : number = "0"; break;
            case "0001" : number = "1"; break;
            case "0010" : number = "2"; break;
            case "0011" : number = "3"; break;
            case "0100" : number = "4"; break;
            case "0101" : number = "5"; break;
            case "0110" : number = "6"; break;
            case "0111" : number = "7"; break;
            case "1000" : number = "8"; break;
            case "1001" : number = "9"; break;
            case "1010" : number = "A"; break;
            case "1011" : number = "B"; break;
            case "1100" : number = "C"; break;
            case "1101" : number = "D"; break;
            case "1110" : number = "E"; break;
            case "1111" : number = "F"; break;

        }
        return number;
    }

}

Answer 1

这个怎么样:Integer.toHexString(Integer.valueOf(binary, 2))