Need help with Java.

Question

I made a program to print patterns composed of stars. I'm getting the following error:

Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at Program.TriangularGrid(Program.java:42)
at Program.main(Program.java:22)

Removing close() isn't helping
https://code.sololearn.com/cyx5782X6K5F/?ref=app

Answer 1

I got it, you have to define the scan variable like a global variable.

public static Scanner scan = new Scanner(System.in);

public static void main(String[] args) {
....
}

For example:
http://stackoverflow.com/questions/12832006/scanner-error-with-nextint

Answer 2

Hi Casey,
You need to send your inputs into separate lines to compile your code. Sololearn just compile your code according the inputs that you send it is not like IDE.

Take a look this code when just send one input.
https://code.sololearn.com/cVYEl0h520tj/#java

JIC: http://stackoverflow.com/questions/12832006/scanner-error-with-nextint

Answer 3

Yes, I was thinking that too cause the code worked fine in Eclipse.
I want it to run in SoloLearn too.
I send my input in multiple lines, It doesn't work.
for example:
1
5

This gives the value of 'choice' as 1 which then calls the TriangularGrid() and then passes the value "5" in the variable 'value'.
What am I doing wrong?

Answer 4

I also tried the if(hasNextInt()) statement but that just messes up all the variable declaration for some reason.

Answer 5

Thank you so much :D
It worked.