Fast Scanner class for reading values from terminal and files

Test.java

public class Test {
    public static void main(String[] args) throws IOException {
       ...
    }

    static class FastScanner {
        BufferedReader br;
        StringTokenizer st;

        //! Receives input from a file
        public FastScanner(File file) throws FileNotFoundException {
            br = new BufferedReader(new FileReader(file));
        }
        //! Receives input from the terminal
        public FastScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }
        // @return - the next string token from the tokenizer
        // if tokenizer `hasMoreElements` OR*
        // create a new StringTokenizer that consumes a line from <BufferedReader/>
        public String next() {
            while(st == null || !st.hasMoreElements()){
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
    }
}