public?static?void?printHexByByteArray(String?fileName)throws?IOException{
		FileInputStream?in?=?new?FileInputStream(fileName);
		byte[]?buf?=?new?byte[20*1024];
		int?bytes?=?in.read(buf,?0,?buf.length);
		int?j?=?1;
		for(int?i=0;i<bytes;i++){
			if(buf[i]<=0xf){
				System.out.print("0");
			}
			System.out.print(Integer.toHexString(buf[i])+"?");
			if(j++%10==0){
				System.out.println();
			}
		}
	}

0ffffffca?0fffffffe?0ffffffba?0ffffffbe?00?00?00?34?00?34