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.

Read a File. In the previous chapter, you learned how to create and write to a file. In the following example, we use the Scanner class to read the contents of the text file we created in the previous chapter:

My favorite way to read a small file is to use a BufferedReader and a StringBuilder. It is very simple and to the point (though not particularly effective, but good enough for most cases): StringBuilder sb = new StringBuilder(); String line = br.readLine(); while (line != null) { sb.append(line); sb.append(System.lineSeparator());

Nov 8, 2022 · As Java provides java.nio.file. API we can use java.nio.file.Files class to read all the contents of a file into an array. To read a text file we can use the readAllBytes () method of Files class with which using this method, when you need all the file contents in memory as well as when you are working on small files. Example: Output:

Jul 28, 2019 · In this tutorial, we show you how to read from and write to text (or character) files using classes available in the java.io package. First, let’s look at the different classes that are capable of reading and writing character streams. 1. Reader, InputStreamReader, FileReader and BufferedReader.

Apr 8, 2009 · If your file is strictly text, I prefer to use the java.util.Scanner class. You can create a Scanner out of a file by: Scanner fileIn = new Scanner(new File(thePathToYourFile)); Then, you can read text from the file using the methods: fileIn.nextLine(); // Reads one line from the file fileIn.next(); // Reads one word from the file

Jan 10, 2025 · The following are the several operations that can be performed on a file in Java: Create a File; Read from a File; Write to a File; Delete a File; 1. Create a File. In order to create a file in Java, you can use the createNewFile() method. If the file is successfully created, it will return a Boolean value true and false if the file already ...

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 ...

Sep 19, 2012 · I have a simple .txt file which has pure Java code inside it like public class C { public static void main(String[] args ) { System.out.println("This is executed"); } } The file is named C.txt.

Aug 3, 2022 · Here is the example class showing how to read a text file in java. The example methods are using Scanner, Files, BufferedReader with Encoding support and FileReader. public static void main(String[] args) throws IOException { String fileName = "/Users/pankaj/source.txt"; //using Java 7 Files class to process small files, get complete file data.