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;
    }
}