Please someone find error in this code. Exception in thread "main" java.lang.NullPointerException

Question

https://code.sololearn.com/cbvpqBn0zwXm/?ref=app

Answer 1

the code is probably missing some imports... double check.. I'm sleepy.😴

Answer 2

sleepy last night.. I didn't see the * on io imports.. Try to specify the exact location or directory of your files.. on PC something like FileReader("c://JavaProjects//filename.txt"); on smartphones, I don't know how to locate the directory, and probably you'll need permissions in accessing the drives..😸.. keep calm and enjoy coding..🏃🏃

Answer 3

Aisha aa u can observe something is wrong with way u parse argument go to stack overflow u can get this fixed easily

Answer 4

Your in.ReadLine() is causing the problem.
You can test it by using a Scanner or replace it with an "4"

Answer 5

Paste the error code you get on Eclipse here

Answer 6

what to write instead of in.readLine() ?

Answer 7

What are you trying to achieve with DataInputStream?

Answer 8

it allows an application to read primitive data from the input stream in a machine-independent way

Answer 9

You mean like a file stream?

Answer 10

:/ I prefer using the Scanner class. Just because it will save time for now

Answer 11

program is running fine, I'm getting error when I'm selecting choice 2 i.e. voting.
error is in voting func.

Answer 12

Well File not found?
Does it work on PC?

Answer 13

Yeah. it is working Only I'm getting error while selecting choice 3 i.e. voting

Answer 14

This would be so perfect in C# tho.

Option 1: Ok
Option 2: File not Found
Option 3: File not Found
Option 4: Ok