Use of functions in static block

Question

Hello,
I have this app containing a static {} block. The reason it's there is to 1) provide a splash screen 2) have input dialog to process input string and check if it's valid in order to load app or not.
In pseudocode it's like this:
1 - get input string with showInputDialog()
2 - check for the input string validity (a valid string is with prefix A-, C- or S-)
3 - if string is valid, load the app
4 - if string is not valid, proceed to step 1.
As you may already see, there is going to be a lot of code (with if-else statements) to check for A-, C- and S- prefixed because I am using indexOf() function which takes only one parameter.
I am considering a way to somehow check recursively, but for this I think I'll need a function to call indexOf() with A-, C-, S- and assess validity for each case.
My question is, is there a way in the static block to have a function? Or can somebody please recommend an efficient approach to checking a string validity with different possibilities inside a static block as in my case, to avoid lots of if-else statements?
P.S. My apologies for initially posting this thread in wrong section.
Thank you!
Victor.

Answer 1

DrClap wrote:
What's a function? And why are you particularly concerned about doing those things in a static initializer as opposed to in some other place?Hi,
Sorry, I'm still thinking c++. I meant method. Something like of the form:
static
boolean valid = false;
while string is not valid
stringfrominput = showInputDialog();   
//determine if string is valid
valid = checkvalid(stringfrominput)
//if possible to have
boolean checkvalid(stringfrominput)
recursively process stringfrom input based on A-, S-, or C- prefixes
return boolean value
}I have a jar app. It is Windows-based and runs as a TrayIcon application. If I include this process when class is loaded, this means that the app will be loaded with all its features. But I need to make sure that the app's features will be loaded only if certain conditions are met.
I am not sure how else to approach this requirement without using static {} block.
Thank you,
Victor.