java - How to provoke an error in my program to display the printstacktrace

Question

How do I provoke an error so that the exc.printStackTrace(System.out); is displayed when I run the program:

public String getName(){
    try {
        if(haveName()) return Name;
        else {
            throw new CorrectNameException("no name");
        }
    } catch (ExistException e) {
        return e.getExc();
    } catch (CorrectNameException exc) {
        exc.printStackTrace(System.out);
        return "nameless";
    }
}

Answer 1

Make haveName() return false. Simple.

Answer 2

According to what you posted in question, answer would be "When haveName() method returns false"

But If you explain complete use case, we can rectify your code a little bit. As per my understanding your method is checking two things.

• Name exist or not?
• Name is valid or not?

So I have couple of question regarding your query:

• Does method haveName() check for existence and validity both? (or only for existence).
• Are you throwing any exception inside haveName() method?