when exactly are we supposed to use “public static final String”?

Question

I have seen much code where people write public static final String mystring = ... and then just use a value.

Why do they have to do that? Why do they h

Answer 1

final indicates that the value cannot be changed once set. static allows you to set the value, and that value will be the same for ALL instances of the class which utilize it. Also, you may access the value of a public static string w/o having an instance of a class.