How to use more than 2 delimiters

Question

I want to delimit ,\\s but I also want to delimit \n, what I thought of so far was ,\\s||\n but this didn't work, anyone got an idea? It of course worked as a delimiter, but it gave back IPHONE , 7.0, 4, ., 7, A, false, 0 whilst I want back IPHONE 7, 4.7, A10, GSM, JET BLACK, 32GB, TRUE, 700

The file I'm scanning is this:

IPHONE 7, 4.7, A10, GSM, JET BLACK, 32GB, TRUE, 700
IPAD AIR 2, 9.7, A8, TRUE, SILVER, 64GB, 400

The code I'm using to scan it, is this:

public static iPhone read(Scanner sc) {
        boolean touchtech = false;
        //int price = 12;
        sc.next();
        sc.useDelimiter(",\\s||\n");
        String model = sc.next();
        double screensize = sc.nextDouble();
        String processor = sc.next();
        String modem = sc.next();
        String color = sc.next();
        String memory = sc.next();
        String touchtechtest = sc.next();
        if(touchtechtest.equals("TRUE")) {
            touchtech = true;
        }
        int price = sc.nextInt();
        sc.close();
        iPhone res = new iPhone(model, screensize, processor, modem, color, memory, touchtech, price);
        return res;
    }

You could just read one entire line from the scanner, then use `String.split()` to split it into pieces. — Jason, Oct 31 '17 at 21:37

score 0 · Answer 1 · answered Oct 31 '17 at 21:37

0

useDelimiter receives a regex. So, in your case, correct string would be "(,\\s|\n)". Your OR conditions go into round parentheses, and are separated by single pipe, not double pipe.

You can also refer to this excellent answer: How do I use a delimiter in Java Scanner?

answered Oct 31 '17 at 21:37

Alexey Soshin

12,856
2
15
24

I just tried that, it did not work. It gives an InputMismatchException for line 28, which in this case is the line int price = sc.nextInt(); – Wolf Bubberman Oct 31 '17 at 21:40
It has to be the right format. If I change it into a String it works and gives back 700, which is an int right? – Wolf Bubberman Oct 31 '17 at 22:37
I think the parentheses are unnecessary here. – shmosel Oct 31 '17 at 23:21

score 0 · Accepted Answer · answered Oct 31 '17 at 23:00

Sometimes String.class itself is more than enough to handle your needs. Why don't you split the line instead using regex and operate on the result? e.g.

public static iPhone read(Scanner sc) { // Better yet just make it received a String
    final String line = sc.nextLine();
    final String [] result = line.split("(,)\\s*");

    // count if the number of inputs are correct
    if (result.length == 8) {
        boolean touchtech = false;
        final String model = result[0];
        final double screensize = Double.parseDouble(result[1]);
        final String processor = result[2];
        final String modem = result[3];
        final String color = result[4];
        final String memory = result[5];
        final String touchtechtest = result[6];
        if(touchtechtest.equals("TRUE")) {
            touchtech = true;
        }
        final int price = Integer.parseInt(result[7]);
        return new iPhone(model, screensize, processor, modem, color, memory, touchtech, price);
    }
    return new iPhone();// empty iphone
}

How to use more than 2 delimiters

2 Answers2