I'm trying to read this file
C101
VEHICLE
NUMBER CAPACITY
25 200
CUSTOMER
CUST NO. XCOORD. YCOORD. DEMAND READY TIME DUE DATE SERVICE TIME
0 40 50 0 0 1236 0
1 45 68 10 912 967 90
2 45 70 30 825 870 90
3 42 66 10 65 146 90
4 42 68 10 727 782 90
5 42 65 10 15 67 90
6 40 69 20 621 702 90
7 40 66 20 170 225 90
8 38 68 20 255 324 90
But when I read the file, the program throws me this exception:
Exception in thread "main" java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:504)
at java.lang.Integer.parseInt(Integer.java:527)
at VRP.main(VRP.java:43)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)
I cheked my code and debugged, but I can't find the problem.
I used an array to save all the spaces between the columns (I only read the first four columns) and then an ArrayList but it doesn't worked.
public static void main(String[] args) throws Exception {
File f = new File("C101.txt");
FileReader fr = new FileReader(f);
BufferedReader reader = new BufferedReader(fr);
String nada = reader.readLine(); //C101
nada = reader.readLine(); //espacio en blanco
nada = reader.readLine(); //vehicle=25
nada = reader.readLine(); //number, capacity
nada = reader.readLine(); //25, 200
nada = reader.readLine(); //espacio en blanco
nada = reader.readLine(); //customer
nada = reader.readLine(); //encabezados
nada = reader.readLine(); //espacio en blanco
String[] espacios;
int capacity = 200;
int custno, xcoord, ycoord, demand;
ArrayList<String> guardar = new ArrayList<String>();
while (reader.ready()) {
espacios = reader.readLine().trim().split(" ");
for (int i = 0; i < espacios.length; i++) {
guardar.add(espacios[i]);
}
custno = Integer.parseInt(espacios[0]);
xcoord = Integer.parseInt(espacios[1]);
ycoord = Integer.parseInt(espacios[2]);
demand = Integer.parseInt(espacios[3]);
}
}
Sorry for the inconvenient and thank you for your time.
You're splitting on a single space but there is more than one space between the integer columns
espacios = reader.readLine().trim().split("\\s+");