The Scanner class in Java provides a simple way to take input from the user in primitive data types like integers, floats, and characters. It uses a constructor with System.in to take input and breaks it into tokens using whitespace. The Scanner class contains methods like nextInt(), nextLine(), and next() to retrieve input as different data types, though nextLine() can cause issues by skipping the current line unless next() is used first to consume whitespace.

1. Scanner Class in Java
Input in Java – Jagriti Srivastava

2. Scanner Class
- One of the class from java.util package
- Simplest way to take input
- Can take input from user in primitive data types like
int, float, double , char etc
- To take input from user constructor of Scanner is used
with input stream (System.in)
- Breaks the input into tokens using whitespace

3. Scanner Methods
- nextInt(),
- nextByte(),
- nextShort(),
- next(),
- nextLine(),
- nextDouble(),
- nextFloat(),
- nextBoolean()
- next().charAt(0) - returns a single character.

4. Issues with nextLine()
- It past the current line and returns the input that was
skipped.
- This function prints the rest of the current line, leaving
out the line separator at the end.
- The next is set to after the line separator.
- It searches for line separator and skips if no line
separator is present
- Solution : Use next() to maintain whitespace

5. Thank You.