Allowing User To Determine When A Program Is Stopped?

I was tasked with building a program that counts vowels in a phrase or word. I have this working properly, but the problem arises in the next situation. Here is my code:
 
Scanner userInput = new Scanner(System.in);
int userDecision;
String Choice;
String Phrase;
int vowelCount = 0;
System.out.println(" This program will count the number of vowels in it.

[Code] ....

As you can see, I used a 'for' statement to declare how long the program should run. However, I need the user to be able to say when it ends. For example, at the end of the program it must say "There are ______ number of vowels in your word. Please press '1' to run the program again, or any other number to exit."

I understand a do-while loop is needed here, but every time I try and create an adequate loop with no logic errors, I either break my existing code, or the program does not work correctly.

Basically, my question is, what is the best way to perform this task? Is a do-while loop necessary, or is there a better way?