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:

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.

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 .

The most simple way to read data from a file in Java is making use of the File class to read the file and the Scanner class to read the content of the file.

Use following codes to read the file. public static void main(String[] args) { try { System.out.print("Enter the file name with extension : "); Scanner input = new Scanner(System.in); File file = new File(input.nextLine()); input = new Scanner(file); while (input.hasNextLine()) { String line = input.nextLine(); System.out.println(line);

Apr 10, 2019 · This article focus on a few of the commonly used methods to read a file in Java. Files.readString, returns a String (Java 11), max file size 2G. Files.readAllBytes, returns a byte[] (Java 7), max file size 2G.

Feb 7, 2024 · Learn how to read files in Java correctly and efficiently. This blog will teach you the difference between InputStream, InputStramReader and BufferedReader, and when you shuld use them.

Nov 23, 2023 · In this extensive tutorial, we explored various techniques for reading files in Java, ranging from basic text files to more complex CSV files. Understanding the classes and methods provided by Java’s I/O packages is essential for effective file processing.

In this Java tutorial, we will explore different ways to read a text file into String in Java from traditional BufferedReader, new APIs in Java 8 and 11 to third-party libraries such as Apache Commons Lang and Guava.

Dec 16, 2024 · Learn how to use FileInputStream and FileOutputStream in Java for efficient file reading and writing with practical examples and best practices.