Get number of lines in a text file in java

In this tutorial, we will learn how to get number of lines in a text file in java.in many situations you

have to come up with the requirements.

i know you are here because you are in need of this awesome trick to get the number of lines in a text file. first we have to first import the necessary classes then buffered solution and so on we have to handle the exceptions

Java program to get the number of lines in text file

First we have to start with importing classes.

1. first we will import  java.io.* to handle file operations.
2. then after import java.io.* then we will create a Buffered Reader  is used to read the file efficiently.
3. After creating buffered reader readLine() method is used to read lines from file. As long as there are lines, the loop continues.
4. After creating readLine() method we have to increment line count for each line read.the linecount variable is incremented.
5. After we have to print the result, after the loop finishes the linecount is printed to the console.
6. At last we have to handle exceptions try-with-resources block is used to automatically close the Buffered Reader even if an exception occurs.

Let us see example

import java.io.*;

public class LineCounter {
    public static void main(String[] args) {
        String Name1 = "your_file.txt"; // Replace with it your file's path

        try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
            int lineCount = 0;
            String line;
            while ((line = reader.readLine()) != null) {
                lineCount++;
            }
            System.out.println ("Number of lines in the file: " + lineCount);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

 

Here we se some of the  key points w have remember

1. Efficiency: Using a Buffered Reader is generally more efficient than reading the file character by character.
2. Error handling: the try-catch block ensures that the program handles potential exceptions like file not found.
3. Resource handling: The try-catch with resources block automatically closes the Buffered Reader ,preventing resources leaks.