Code doesnt put anything out when comiling

Question

Hey guys for some reason my code doesn't do anything when I compile it and I would appreciate if someone can figure it out, i am not very knowledgeable in java and coding in general and i tried fixing it and i got nothing i thought maybe it was the bufferedreader or the filereader but I'm not sure, so here is my code below

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

public class Driver2 {

    public static ArrayList < String > removeStopWords(String DTP3, String stopwords) throws IOException {
        ArrayList < String > wordlst = new ArrayList < String > ();
        ArrayList < String > stopwordlst = new ArrayList < String > ();

        BufferedReader br1 = new BufferedReader(new FileReader("DTP3.txt"));

        String line = "";

        while ((line = br1.readLine()) != null) {
            String[] words = line.split("[ ().!,:]");

            for (int i = 0; i < words.length; i++) {
                if (words[i].trim().equals("") == false) {
                    wordlst.add(words[i]);
                }
            }
        }

        br1.close();
        ArrayList < String > wordlstUpper = new ArrayList < String > ();
        for (int i = 0; i < wordlst.size(); i++) {
            wordlstUpper.add(wordlst.get(i).toUpperCase());
        }

        BufferedReader br2 = new BufferedReader(new FileReader("stopwords.txt"));
        line = "";
        while ((line = br2.readLine()) != null) {
            stopwordlst.add(line);
        }
        br2.close();

        for (int i = 0; i < stopwordlst.size(); i++) {
            int lastindex = wordlstUpper.indexOf(stopwordlst.get(i).toUpperCase());

            while (lastindex != -1) {
                int index = wordlstUpper.indexOf(stopwordlst.get(i).toUpperCase());
                if (index != -1) {
                    wordlst.remove(index);
                    wordlstUpper.remove(index);
                }
                lastindex = wordlstUpper.indexOf(stopwordlst.get(i).toUpperCase());
            }
        }

        return wordlst;
    }

    public static void main(String[] args) {
        ArrayList < String > list = null;

        try {
            list = removeStopWords("GPT3.txt", "stopwords.txt");
        } catch (IOException e) {
            System.out.print("Error : " + e.getMessage())
        }
        System.out.println("Non Stop Words are----");

        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }
    }
}