My code does not input the file nor print the output

[loud marsh]

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[oblique flare]

is it displaying any error ?

[pure sparrow]

yes

Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:862)
at java.util.Scanner.next(Scanner.java:1371)
at StudentsManager.main(StudentsManager.java:49)
C:\Users\alawy\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 0 seconds)

[oblique flare]

check if the scanner has a next token by calling scanner#hasNext

I suppose the input file contains the commands ?

[pure sparrow]

yes it does

[oblique flare]

could you upload the input file

[pure sparrow]

i thought i uploaded it sorry second pls

[oblique flare]

Your first scanner.nextLine() consumes the entire first line Add student: ID1, Ahmed, CS101, 20 not only the Add student part.
What I would do:

while scanner has another line:
      read the line and store it in a variable
      using the line stored in the variable parse the command and execute it.

that way you keep interaction with the scanner to a minimum and it will be easier to parse the command.

[pure sparrow]

sorry i am a bit frustrated but i'm implementing what you suggested hopefully it will solve the issue

[loud marsh]

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[pure sparrow]

ok it solved the error part but still no output

[oblique flare]

at no point in the program you are writing to your output file. At the very end, after all commands are processed you iterate over the entirety of the Linked list write each Student to the output file

[pure sparrow]

I tried editing both classes if you may take a look

nothing happened

[oblique flare]

try to implement like I suggested here. You only introduced a while loop that checks if th scanner has another line, that's the first step

[loud marsh]

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