> For the complete documentation index, see [llms.txt](https://codewithmeiy.gitbook.io/core-java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://codewithmeiy.gitbook.io/core-java/input-output-i-o/scanner.md).

# Scanner

In Java, you can use the `Scanner` class to read user inputs of various data types. Here are examples of reading different data types using `Scanner`:

1. **Reading Integers:** To read integers from the user, you can use the `nextInt()` method of the `Scanner` class.

   ```java
   import java.util.Scanner;

   public class ReadIntegers {
       public static void main(String[] args) {
           Scanner scanner = new Scanner(System.in);
           System.out.print("Enter an integer: ");
           int num = scanner.nextInt();
           System.out.println("You entered: " + num);
           scanner.close();
       }
   }
   ```
2. **Reading Floating-Point Numbers:** To read floating-point numbers (e.g., doubles or floats), you can use the `nextDouble()` method.

   ```java
   import java.util.Scanner;

   public class ReadFloatingPoint {
       public static void main(String[] args) {
           Scanner scanner = new Scanner(System.in);
           System.out.print("Enter a floating-point number: ");
           double num = scanner.nextDouble();
           System.out.println("You entered: " + num);
           scanner.close();
       }
   }
   ```
3. **Reading Strings:** To read strings, you can use the `next()` or `nextLine()` methods.

   ```java
   import java.util.Scanner;

   public class ReadString {
       public static void main(String[] args) {
           Scanner scanner = new Scanner(System.in);
           System.out.print("Enter a string: ");
           String input = scanner.nextLine();
           System.out.println("You entered: " + input);
           scanner.close();
       }
   }
   ```
4. **Reading Booleans:** To read boolean values (true or false), you can use the `nextBoolean()` method.

   ```java
   import java.util.Scanner;

   public class ReadBoolean {
       public static void main(String[] args) {
           Scanner scanner = new Scanner(System.in);
           System.out.print("Enter a boolean value (true/false): ");
           boolean value = scanner.nextBoolean();
           System.out.println("You entered: " + value);
           scanner.close();
       }
   }
   ```
5. **Reading Characters:** To read individual characters, you can use the `next()` method and retrieve the first character of the input string.

   ```java
   import java.util.Scanner;

   public class ReadChar {
       public static void main(String[] args) {
           Scanner scanner = new Scanner(System.in);
           System.out.print("Enter a character: ");
           String input = scanner.next();
           char ch = input.charAt(0);
           System.out.println("You entered: " + ch);
           scanner.close();
       }
   }
   ```

These are some common ways to read user inputs of different data types using the `Scanner` class in Java. Remember to handle exceptions, such as `InputMismatchException` or `NoSuchElementException`, when the user input doesn't match the expected data type.