Declare final variable, but set later

Question

I know this is fairly simple topic, but I really want to wrap my head around it.

This is what I\'m trying to do, but it doesn\'t like the final modifier. Is there an

Answer 1

You can set later a global final Variable only in your constructor. Example:

public class ClassA {
   private final long mID;

   public ClassA(final long mID) {
      this.mID = mID;
   }
}

In this case in each constructor you have to initialize the final variable.