How can I properly read data from bar code scanner?

Fix java code to get a certain input?

• This is my code so far, and it works just fine: public static void main(String[] args) { Scanner scanner = new Scanner (System.in); List<Integer> list = new ArrayList<Integer>();{ while (scanner.hasNext()) { // do we have one more line? list.clear(); // we need empty list for (int i=0;i<3;i++) { // read 3 numbers list.add(scanner.nextInt()); } Collections.sort(list); int max = list.get(2); int middle = list.get(1); System.out.println(list); System.out.println(max+middle); } } } } What should I do to fix it so the input would have to be entered like this? 12 //number of sets 33 -34 18 //first of 12 data sets -42 44 -34 //second of 12 -42 7 44 //third etc... 4 33 44 14 7 -34 44 33 7 -34 18 18 7 -34 -34 4 14 18 7 18 -34 14 14 4 7 33 33

• Answer:

  The first int you read would be an exit condition for a for loop: int numberOfDataSets=scanner.nextInt(); for(int i=0;i<numberOfDataSets;i++) { ... Your code } That way, your app will only run for the number of sets indicated in the input data.