How to test for blank line with Java Scanner?

Question

I am expecting input with the scanner until there is nothing (i.e. when user enters a blank line). How do I achieve this?

I tried:

while (scanner.ha         


        

Answer 1

AlexFZ is right, scanner.hasNext() will always be true and loop doesn't end, because there is always string input even though it is empty "".

I had a same problem and i solved it like this:

do{
    // process input

    }while(line.length()!=0);
    

I think do-while will fit here better becasue you have to evaluate input after user has entered it.