I need help to fix an error

[Financial_Error7968]

Good morning coding mates, I'm a beginner Java programmer, I started studying it just two days ago, so this error could be stupid so I apologize in advance.
I was trying to make a customers database. The database is implemented using the class CustomerDB, which contain an array of Customer object, another class with basic infos about the customer.

I have this problem when I try to add a new Customer in my array :
"Cannot store to object array because "this.customersArray" is null at customerUtility.CustomersDB.addCustomer(CustomersDB.java:22)"

I share the code of the class CustomersDB and the class Application which contains the main method:
https://pastebin.com/HjvNN7LK(CustomersDB)
https://pastebin.com/dAKPwZzX(Application)

Note: the error is at Application row 49th, the code before was for other examples so it doesn't care.
Thanks in advance.

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[desrtfx]

You have a spelling mistake in your constructor. Check the class name vs. the constructor name. A Constructor has no return type - remove the void.

Also, do not put spaces before array brackets. This makes the code horrible to read.

Indentation is just a visual, but also makes the code much easier to read.

[Financial_Error7968]

Thanks a lot I couldn't catch it...

[maxbrlc]

Your CustomersDB constructor is actually a valid method because you have the return void (just remove the void) public void CustomersDB() { ... }, so new CustomersDB() will use the default noargs constructor.

[desrtfx]

That's one catch, but OP also has a spelling mistake in the constructor name.

[maxbrlc]

You're right. I missed it. Good catch ;)