The Scanner class is used to get user input, and it is found in the java.util package. To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class documentation.

A simple text scanner which can parse primitive types and strings using regular expressions. A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace.

Apr 11, 2025 · In Java, the Scanner class is present in the java.util package is used to obtain input for primitive types like int, double, etc., and strings. We can use this class to read input from a user or a file. In this article, we cover how to take …

Here, we have created objects of the Scanner class that will read input from InputStream, File, and String respectively. The Scanner class provides various methods that allow us to read inputs of different types. class Main { public static void main(String[] args) { // creates a Scanner object . Scanner input = new Scanner(System.in);

Jul 9, 2014 · Check out our detailed Scanner Java Example! We will also see how to use the Java Scanner class to read a Java input form the console.

Jul 29, 2019 · In this Java File IO tutorial, you will understand how the Scanner class works with various examples which you can use for your daily Java coding. * How does a Scanner work? Basically, a Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace (blanks, tabs, and line terminators).

What is the Java Scanner class? How to set up and import Scanner; How to use Scanner. How to read text input with next() and nextLine() How to read numbers with nextInt() and nextDouble() How to read Boolean input; Best practices for using Scanner; Common mistakes and how to fix them; Time to give a Scanner a try with your own code!

To see how scanning works, let's look at ScanXan, a program that reads the individual words in xanadu.txt and prints them out, one per line. public static void main(String[] args) throws IOException { Scanner s = null; try { s = new Scanner(new BufferedReader(new FileReader("xanadu.txt"))); while (s.hasNext()) { System.out.println(s.next());

Apr 1, 2025 · 1. Introduction. The java.util.Scanner class can read input from System.in, File, InputStream, Path, Readable, String, etc.It implements the Closeable and AutoCloseable interfaces. The scanner close method will close its input source if the input source implements the Closeable interface. In this example, I will demonstrate how Eclipse IDE detects the resource leak and how to close a scanner ...

Sep 11, 2022 · In this tutorial, you will learn Java Scanner class and how to use it in java programs to get the user input. This is one of the important classes as it provides you various methods to capture different types of user entered data.