Read all lines with BufferedReader in java

Read all lines with BufferedReader in java

To read all lines of a text file using BufferedReader in Java, you typically use a loop that continues reading lines until the end of the file is reached. The BufferedReader.readLine() method is used for this purpose. It reads a line of text and returns null when the end of the stream (file) is reached.

Here's an example of how you can read all lines from a file using BufferedReader:

import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; public class ReadFileExample { public static void main(String[] args) { String filePath = "path/to/your/file.txt"; // Replace with your file path try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) { String line; while ((line = reader.readLine()) != null) { // Process the line System.out.println(line); } } catch (IOException e) { e.printStackTrace(); } } }

In this example:

  • A BufferedReader is created to read from a file specified by filePath.
  • The try-with-resources statement is used to ensure that the BufferedReader is closed automatically after the try block is exited, either normally or because of an exception.
  • Inside the try block, a loop is used to read lines from the file. reader.readLine() returns a line of text without the newline character.
  • The loop continues until readLine() returns null, indicating the end of the file.
  • Each line is then printed to the console, but in a real-world scenario, you might process the lines as needed for your application.

Make sure to replace "path/to/your/file.txt" with the actual path to the file you want to read. This code will print the contents of the file to the console, line by line.

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