This code gives me an incompatible types error. It says it requires a Scanner but found String. I don't understnd how I can fix it

Question

public static void getBooks(){

    int bookNum = 0;
    bookFile = new File(args[0]);
    Scanner input = new Scanner(bookFile);

    while (input.hasNextLine()) {
        bookNum += 1;
        input = input.nextLine();
    }
    ...
}

I need it to add the number of books as long as there are books to add meaning while there is a next line.

What is the declared type of the variable `input`? What is the return type of the method `nextLine()`? — Sotirios Delimanolis, Mar 15 '14 at 19:31
`input.nextLine()` returns a String, and you're trying to put it into `input`, which is a Scanner. Change that. — AntonH, Mar 15 '14 at 19:32
Try looking at this: http://stackoverflow.com/questions/11871520/how-to-use-the-scanner-class-in-java — AntonH, Mar 15 '14 at 19:34

score 1 · Accepted Answer · answered Mar 15 '14 at 19:33

1

The problem is here:

    input = input.nextLine();

The two inputs are probably meant to be two separate variables. Change this to something like:

    String line = input.nextLine();
    // use `line' here

answered Mar 15 '14 at 19:33

NPE

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score 0 · Answer 2 · answered Mar 15 '14 at 19:33

0

This input = input.nextLine(); makes no sense. What do you want to do? Just run input.nextLine()

answered Mar 15 '14 at 19:33

Piotr Gwiazda

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This code gives me an incompatible types error. It says it requires a Scanner but found String. I don't understnd how I can fix it

2 Answers2