import java.io.FileReader;
import java.io.BufferedReader;
import java.io.*;
import java.util.ArrayList;
import java.util.*;

public class FormatFile {

    public static void main(String[] args)
    {
        try {
            String filename= "out.txt";
            FileWriter fw = new FileWriter(filename);
            fw.write("");
            fw.close();
        }
        catch (Exception e){System.err.println("" + e);}

        // get data from args
        String filename = "testFile.txt";

        // file IO
        BufferedReader reader;
        String line;
        String[] tokens;

        // try/catch because file IO
        try
        {
            reader = new BufferedReader(new FileReader(filename)); //set up I/O

            // MAIN LOOP: this is for EACH line you read in
            while ((line = reader.readLine()) != null)
            {
                String[] splitClass = line.split("\t"); //split the line by tab, so splitClass[0] is things left of tab, [1] is things to the right aka the rest of the line
                tokens = splitClass[1].split(" "); //split the right side by spaces
                Output(tokens, splitClass); //output to file method
            }
        }
        catch (Exception e){System.err.println("" + e);}
    }

    private static void Output(String[] stringArray, String[] stringArray2)
    {

        String text = stringArray2[0] + "\t"; //add class and tab
        int i;

        for(String t : stringArray)
        {
            if (t.length() >= 3) //if a words string length is bigger than 2
                text += t + " ";
        }
        text += "\n"; //new line on end

        try {
            String filename= "out.txt";
            FileWriter fw = new FileWriter(filename, true);
            fw.write(text);
            fw.close();
        }
        catch (Exception e){System.err.println("" + e);}
    }
}