读取图片最后2个字节码

public static void main(String[] args) {
		File file=new File("D:/preparedSource/2/12345678901420111203210722.jpg");
		RandomAccessFile randomfile=null;
		int result=0;
		long len;
		String str="";
		try {
			randomfile=new RandomAccessFile(file,"r");
			len=randomfile.length();
			randomfile.seek(len-2);
			while((result=randomfile.read())!=-1){
				str += Integer.toHexString(result & 0xff);
			}
			System.out.println(str);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}