Java异或校验

今天要用到异或校验，折腾了半天，写下来留作备用。
功能是将一串16进制的数进行异或校验，输出校验和。
代码：

import java.util.Scanner;/* * 亦或校验算法 */public class Checksum_XOR {    @SuppressWarnings("resource")    public static void main(String[] args) {        // TODO Auto-generated method stub        while(true){            int i = 0,j = 0;            Scanner scanner = new Scanner(System.in);            String in = scanner.nextLine();            int len = in.length();            short inb[] = new short[len];            for(i=0;i<len;i++){                inb[i] = charToHex(in.charAt(i));   //将String里的每一个char转换为Hex            }            for(i =0;i<len;i++){    //将每两个Hex合并成一个byte                inb[j] = (byte) (((inb[i]<<4)&0x00f0)|((inb[i+1])&0x000f));                i++;                j++;            }            byte temp = 0x00; //校验值            for(i = 0;i<len/2;i++){ //异或                temp ^= inb[i];            }            System.out.printf("%x", temp);        }    }    static short charToHex(char x){ //将单个char转换为Hex        short result = 0;        switch(x){        case 'a':result=10;break;        case 'b':result=11;break;        case 'c':result=12;break;        case 'd':result=13;break;        case 'e':result=14;break;        case 'f':result=15;break;        case 'A':result=10;break;        case 'B':result=11;break;        case 'C':result=12;break;        case 'D':result=13;break;        case 'E':result=14;break;        case 'F':result=15;break;        default:result = (short) Character.getNumericValue(x);break;        }        return result;    }}