public class WordCount {
    public static void main(String[] args) {
        InputStream is = null;
        OutputStream os = null;
        boolean alphaOrder = true;

        if (args.length == 2 || args.length == 3) {
            int i = 0;

            if (args.length == 3) {
                if (args[0] == null) {
                    // 输出错误信息
                    return;
                }

                switch (args[i++]) {
                case "-a":
                    break;
                case "-c":
                    alphaOrder = false;
                    break;
                default:
                    // 输出错误信息
                    return;
                }
            }

            if ("-".equals(args[i]))
                is = System.in;
            else
                try {
                    is = new FileInputStream(args[i]);
                } catch (IOException ex) {
                    ex.printStackTrace();
                    return;
                }

            i++;

            if ("-".equals(args[i]))
                os = System.out;
            else
                try {
                    os = new FileOutputStream(args[i]);
                } catch (IOException ex) {
                    ex.printStackTrace();
                    return;
                }
        } else {
            // 输出错误信息
            return;
        }

        // 数据读写和单词计数部分自己可以写了吧
    }
}