A little help :) (Java)

Question

https://code.sololearn.com/cA1A23a6A9A3/#java

can you look into my code and tell me why we use "private static final Scanner scanner = new Scanner(System.in);" I know the uses of final but what consequences will I face if I don't add "final" while initializing Scanner object?

Answer 1

Rabeeh

Final means you cannot reassign anything.

Final can be use in 3 cases:

1. When you don't want to change the value
2. When you don't want to override method
3. When you don't want to inherit the class

Here scanner is a variable of Scanner class. So doens't matter of final. You can make a variable final but you cannot reassign value.

Just write scanner = new Scanner (System.in) you will get an error.

"cannot assign value to final variable scanner"

Answer 2

Rabeeh

You have to import util package because Scanner class exist in this package.

import java.util.*;

Answer 3

Beside that why we use final here? Look if we remove the "final" the code will work as normal. I want to know is that a convention among coders to use final in such cases?
I Am AJ !