READ INPUT | Notion

In Java, the Scanner class is part of the java.util package and is used for reading input from various sources, such as the keyboard or a file.

Method	Description
`Scanner(InputStream source)`	Constructs a new `Scanner` that produces values scanned from the specified input stream. Common sources include `System.in` for standard input or any other `InputStream`.
`Scanner(File source)`	Constructs a new `Scanner` that produces values scanned from the specified file.
`Scanner(String source)`	Constructs a new `Scanner` that produces values scanned from the specified string.
`next()`	Finds and returns the next complete token from the scanner.
`nextLine()`	Advances the scanner to the next line and returns the content of that line.
`nextInt()`	Scans the next token as an `int`.
`nextDouble()`	Scans the next token as a `double`.
`nextBoolean()`	Scans the next token as a `boolean`.
`hasNext()`	Returns `true` if there is another token in the input, otherwise `false`.
`hasNextInt()`	Returns `true` if the next token can be interpreted as an `int`, otherwise `false`.
`hasNextDouble()`	Returns `true` if the next token can be interpreted as a `double`, otherwise `false`.
`useDelimiter(String pattern)`	Sets the delimiter pattern to the specified regular expression. By default, the delimiter is set to whitespace.
`close()`	Closes the `Scanner`. It is good practice to close the scanner when it is no longer needed.

Here's a simple example of using the Scanner class to read user input from the console:

import java.util.Scanner;

public class ScannerExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter your name: ");
        String name = scanner.nextLine();

        System.out.print("Enter your age: ");
        int age = scanner.nextInt();

        System.out.println("Hello, " + name + "! You are " + age + " years old.");

        // Don't forget to close the scanner
        scanner.close();
    }
}