February 20, 2025 - package com.journaldev.readfileslinebyline; import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; public class ReadFileLineByLineUsingBufferedReader { public static void main(String[] args) { BufferedReader reader; try { reader = new BufferedReader(new FileReader("sample.txt")); String line = reader.readLine(); while (line != null) { System.out.println(line); // read next line line = reader.readLine(); } reader.close(); } catch (IOException e) { e.printStackTrace(); } } }

Variables Print Variables Multiple Variables Identifiers Constants (Final) Real-Life Examples Code Challenge Java Data Types

April 21, 2026 - public String readLine() throws IOException · Reads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed. Returns: A String containing the contents of the line, not including ...

June 12, 2020 - Below programs illustrate readLine(String, Object) method in Console class in IO package: Program 1: ... // Java program to illustrate // Console readLine(String, Object) method import java.io.*; public class GFG { public static void main(String[] args) { // Create the console object Console cnsl = System.console(); if (cnsl == null) { System.out.println( "No console available"); return; } String fmt = "%1$4s %2$10s %3$10s%n"; // Read line String str = cnsl.readLine( fmt, "Enter", "string : "); // Print line System.out.println( "You entered : " + str); } }

Imagine needing to process a set of numbers stored in a file — reading each integer and calculating their sum. This is a practical task you can easily accomplish using Files.readAllLines and basic string manipulation in Java.

July 27, 2024 - import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class TraditionalFileReader { public static void main(String[] args) { List<String> lines = new ArrayList<>(); try (BufferedReader br = new BufferedReader(new FileReader("example.txt"))) { String line; while ((line = br.readLine()) != null) { lines.add(line); } } catch (IOException e) { e.printStackTrace(); } lines.forEach(System.out::println); } } In this example, reading a file involves creating a BufferedReader, reading lines in a loop, and handling exceptions.

January 8, 2024 - Note that readLine() will return null when the end of the file is reached. In JDK7, the NIO package was significantly updated. Let’s look at an example using the Files class and the readAllLines method. The readAllLines method accepts a Path. Path class can be considered an upgrade of the java.io.File with some additional operations in place.

August 5, 2022 - The readLine() method of BufferedReader class is used to read a one line text from a given input source for example, a file.

Please let me know what modifications ... br_reader.readLine(); System.out.println("Line ::"+strin); }catch(IOException objIOException) {} } } Thanks Sravam [ August 07, 2003: Message edited by: sravan reddy ] ... As is, it should basically work and display the first line of the file (you'd want to add "import java.io.*;" at ...

August 30, 2024 - Here’s a basic example of how to use BufferedReader.readLine(): import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; public class ReadFileExample { public static void main(String[] args) { try (BufferedReader br = new BufferedReader(new FileReader("largefile.txt"))) { String line; while ((line = br.readLine()) != null) { System.out.println(line); } } catch (IOException e) { e.printStackTrace(); } } }

November 21, 2025 - Learn different ways of reading a line at a given line number inside a file

import java.io.BufferedReader; class FileRead { public static void main( String args[] ) { int n = 40; // The line number · String line; try (BufferedReader br = new BufferedReader(new FileReader("file.txt"))) { for (int i = 0; i < n; i++) br.readLine(); line = br.readLine(); System.out.println(line); } catch(IOException e){ System.out.println(e); } } } Run ·

May 28, 2020 - The readLine() method of BufferedReader class in Java is used to read one line text at a time. The end of a line is to be understood by '\n' or '\r' or EOF.

August 22, 2023 - try { List<String> lines = FileUtils.readLines(file, Charset.defaultCharset()); } catch (IOException e) { e.printStackTrace(); } That’s all for Java example to read a file line by line. Please put your questions in the comments section. Happy Learning !! Source Code on Github ·

February 17, 2020 - The readLine() method reads a line of text from the file and returns a string containing the contents of the line, excluding any line-termination characters or null.

The new Java I/O libraries (java.nio) had the best overall winner (java.nio.Files.readAllBytes()) but it was followed closely behind by BufferedReader.readLine() which was also a proven top performer across the board. The other excellent performer was java.nio.Files.lines(Path) which had slightly worse numbers for smaller test files but really excelled with the larger test files.

December 27, 2016 - package com.mkyong; import org.apache.commons.io.FileUtils; import java.io.File; import java.io.IOException; import java.util.List; public class ReadTextFile { public static void main(String[] args) throws IOException { try { File f = new File("src/com/mkyong/data.txt"); System.out.println("Reading files using Apache IO:"); List<String> lines = FileUtils.readLines(f, "UTF-8"); for (String line : lines) { System.out.println(line); } } catch (IOException e) { e.printStackTrace(); } } } The output on executing above code will be: Reading files using Apache IO: A B C D 1 2 3 ·

February 20, 2024 - The readLine() method is then used to read a line from the file, which is printed to the console. This is a basic way to read a line in Java, but there’s much more to learn about handling different sources and advanced techniques.