How to prompt a user to enter data if nothing is entered for the file name?

Question

public static void main(String[] args) {
    System.out.println("Input filename: ");
    Scanner sc = new Scanner(System.in);
    String input = sc.nextLine();

    while (input.length() == 0){
        System.out.println("Please enter names: ");
        String names = sc.nextLine();
        }
    }

How do I make the program end when no more NAMES are entered?

Are you saying if the program is run with no arguments in main's parameter? — liquidsystem, Dec 09 '15 at 00:34
Possible duplicate of [How do I compare strings in Java?](http://stackoverflow.com/questions/513832/how-do-i-compare-strings-in-java) — Jaskaranbir Singh, Dec 09 '15 at 00:36
if nothing is entered in input, the program is supposed to ask for names to be entered. — onepunchman, Dec 09 '15 at 00:39

score 0 · Answer 1 · answered Dec 09 '15 at 00:38

0

while(input.length() == 0){   // use length() method
        System.out.println("Please enter names: ");
        String names = sc.nextLine(); //Same scanner but read names to enter into an array
        }
    }

answered Dec 09 '15 at 00:38

nicomp

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After the user is done entering names, how do you store the names into an array and stop the while loop? – onepunchman Dec 09 '15 at 00:44
The while loop is only when the user types in nothing. Your question did not address storing names and looping multiple names. – nicomp Dec 09 '15 at 00:46

How to prompt a user to enter data if nothing is entered for the file name?

1 Answers1