Get second column from files in directory and write to csv

list-files.sh

#!/usr/bin/env bash

FOLDER=name_of_folder

for f in $(ls $FOLDER)
do
 echo "Processing $f"
 awk '{print $2}' $FOLDER/$f | sed "s/(//" | sed "s/)//" > $FOLDER/$f.csv
done

ListFiles.java

import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class ListFiles {

    public static void main(String[] args) throws IOException {

        String path = (args.length > 0) ? args[0] : ".";

        String filePath;
        String[] fileContent;
        String[] lines;
        String outFileContent = "";
        File folder = new File(path);
        File[] listOfFiles = folder.listFiles();

        if (listOfFiles != null) {
            for (File listOfFile : listOfFiles) {

                if (listOfFile.isFile()) {
                    filePath = path + "/" + listOfFile.getName();

                    if (filePath.endsWith(".txt") || filePath.endsWith(".TXT")) {
                        fileContent = readLines(filePath);
                        System.out.println("Processing: " + filePath);
                        for (String line : fileContent) {
                            lines = line.split(" ");
                            if (lines.length > 0) {
                                outFileContent += lines[1].replace("(", "").replace(")", "") + "\n";
                            }
                        }
                        writeLines(filePath + ".csv", outFileContent);
                    }
                }
            }
        } else {
            System.out.println("No such folder");
        }

        System.out.println("Done");
    }

    private static String[] readLines(String filename) throws IOException {
        FileReader fileReader = new FileReader(filename);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        List<String> lines = new ArrayList<String>();
        String line = null;
        while ((line = bufferedReader.readLine()) != null) {
            lines.add(line);
        }
        bufferedReader.close();
        return lines.toArray(new String[lines.size()]);
    }

    private static void writeLines(String filename, String content) {
        try {
            File f;
            f = new File(filename);
            if (!f.exists()) {
                f.createNewFile();
            }
            FileWriter fStream = new FileWriter(f);
            BufferedWriter out = new BufferedWriter(fStream);
            out.write(content);
            out.close();
        } catch (Exception e) {
            System.err.println("Error: " + e.getMessage());
        }
    }

}