Week 7 Airport Exercise issue

[Timothy Walter]

Hi,

I'm having problems with week 7 exercise 8.

I am getting a null pointer exception on line 35 of my UI class when it tries to send variables to  a method of another class. I have compared my code against the previous exercise and can't see where i went wrong. Any ideas?

The link to my work is here: 

https://tmc.mooc.fi/mooc/paste/F8hUvPUjSYxcfuVfodF1ow

Best regards

Tim.

[Timothy Walter]

The error would be on line 34 of TMC.

[Joni]

Hi,

Looking at your UI.java constructor I see this:

this.airplanes=airplanes;

Now your constructor declarator is this:

public UI(Scanner reader, Airplanes airplane, Flights flights) {

airplane != airplanes so basically you are saysin this.airplanes = this.airplanes which is why airplanes is null :)

Best regards

Joni

[Timothy Walter]

Thank you, that completely fixed it. Drove me crazy as i couldn't see what could be causing the error. I guess I'll make sure to check for things like that in the future.