you must use a file name by it's extension in File object constructor, as an example: File myFile = new File("test.txt"); but there is a better way to use it inside Scanner object by pass the filename absolute address, as an example: Scanner sc = new Scanner(Paths.get("test.txt")); in this way you must import java.nio.file.Paths as well.

In the following example, we use the Scanner class to read the contents of the text file we created in the previous chapter: myReader.close(); } catch (FileNotFoundException e) { System.out.println("An error occurred."); e.printStackTrace(); } } } Files in …

Jan 4, 2025 · There are several ways to read a plain text file in Java e.g. you can use FileReader, BufferedReader, or Scanner to read a text file. Every utility provides something special e.g. BufferedReader provides buffering of data for fast reading, and Scanner provides parsing ability.

Feb 15, 2013 · // Prepare to read from the file, using a Scanner object. File file = new File(filename); Scanner in = new Scanner(file); ArrayList<DogShop> shops = new ArrayList<DogShop>(); // Read each line until end of file is reached. while (in.hasNextLine()) // Read an entire line, which contains all the details for 1 account. String line = in.nextLine();

From Java 5 onwards java.util.Scanner class can be used to read file in Java. Earlier we have seen examples of reading file in Java using FileInputStream and reading file line by line using BufferedInputStream and in this Java tutorial, we will See How …

Aug 1, 2019 · Learn how to read the contents of a file in Java using the Scanner class with this detailed tutorial.

// -read from filePooped with Scanner class. Scanner inputStream = new Scanner(file); // hashNext() loops line-by-line. while(inputStream.hasNext()){ //read single line, put in string. String data = inputStream.next(); System.out.println(data + "***"); // after loop, close scanner. inputStream.close(); }catch (FileNotFoundException e){

Jan 5, 2024 · We learned how to read input from a file, console, or String using Scanner. We also learned how to find and skip a pattern using Scanner and how to change the Scanner delimiter. Finally, we explained how to handle the NoSuchElementException exception.

Jan 8, 2024 · In this tutorial, we’ll explore different ways to read from a File in Java. First, we’ll learn how to load a file from the classpath, a URL, or from a JAR file using standard Java classes. Second, we’ll see how to read the content with BufferedReader, Scanner, StreamTokenizer, DataInputStream, SequenceInputStream, and FileChannel. We will ...

May 1, 2021 · This post will discuss how to read the contents of a file using Scanner class in Java. Scanner is a utility class in java.util package which can parse primitive types and strings using regular expressions. It can read text from any …