CODEWITHSUNDEEP
javainputoutputjava.util.scanner
SarahQ.
SarahQ.

Reputation: 19

How to scan through an InputFile?

Currently I have a while loop that reads through an input file simply named "input". This input file contains numbers, such as "1 2 3 4" that represent something that is irrelevant to my question. To receive the number "1", I use scanner.nextInt(); If this is the correct way to receive 1, I am stuck on how to receive the other numbers 2 3 4. 

while(scanner.hasNext()){

    int firstnum = scanner.nextInt();
    // How do I get the second, third, and fourth number?

    //It is not guaranteed that I will be given exactly 4 numbers, but I will be given at least that many.

Upvotes: 0

Views: 37

Answers (1)

Mureinik
Mureinik

Reputation: 311978

Just continue the loop and accumulate the numbers you encounter, e.g., to a list:

List<Integer> numbers = new LinkedList<>();
while(scanner.hasNext()) {
    numbers.add(scanner.nextInt());
}

Upvotes: 1

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