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BJP4 Self-Check 6.21: getFileName

Language/Type: Java file processing input Scanner
Author: Marty Stepp (on 2016/09/08)

Write a method named getFileName that repeatedly prompts the user for a file name until the user types the name of a file that exists on the system. Once you get a good file name, return that file name as a String. Here is a sample dialogue from one call to your method, assuming that the file good.txt does exist and the others do not: 

Type a file name: bad.txt
Type a file name: not_here.txt
Type a file name: good.txt
Type your solution here:


This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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