How to Read total number of Rows in a file (csv/txt) ?

How to get the total number of rows in CSV or text Files?

• In Java, we can get Total numbers of rows in CSV files or Text files using File and BufferedReader class which are available in java.io package.
• Let's say, we have CSV and text files in a directory having a specific number of rows in each file like below:

Get rows from files

Read the number of rows in files

Observer here, csvFile1 has 5 rows,csvFile2 has 4 rows and File1.txt has 3 rows.

Demo on Reading number of rows in Files:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
public class csvCountDemo {
    public static void main(String args[]) throws Exception {
        String filePath;
        String directorypath = "D:\\Sessions\\csvFiles";

        List<Integer> rowsCount = new ArrayList<>();

        File directory = new File(directorypath);
        String[] fileList = directory.list();
        for (String name : fileList) {
            System.out.println("file Name=" + name);
            filePath = directorypath + "\\" + name;
            System.out.println("File path=" + filePath);

            BufferedReader br = new BufferedReader(new FileReader(filePath));
            String input;
            int count = 0;
            while ((input = br.readLine()) != null) {
                count++;
            }
            System.out.println("Total number of rows in " + name + " file=" + count);
            rowsCount.add(count);
            System.out.println("added " + count + " to the list");
            System.out.println("-------------------------------");
        }
        int sum;
        sum = rowsCount.stream().mapToInt(Integer::intValue).sum();
        System.out.println("Total number of rows in all csv files=" + sum);
    }
}

Output:

file Name=csvFile1.csv
File path=D:\path\csvFiles\csvFile1.csv
Total number of rows in csvFile1.csv file=5
added 5 to the list
-------------------------------
file Name=csvFile2.csv
File path=D:\path\csvFiles\csvFile2.csv
Total number of rows in csvFile2.csv file=4
added 4 to the list
-------------------------------
file Name=File1.txt
File path=D:\path\csvFiles\File1.txt
Total number of rows in File1.txt file=3
added 3 to the list
-------------------------------
Total number of rows in all csv files=12

Please comment below to feedback or ask questions.