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I need to figure out how to get the following data into two ArrayLists or arrays...

THIS THAT OTHER

 1     2     3 
 4     5     6 
 7     8     9

I need the column titles to go into one array or ArrayList, and the integer values to go into a two dimensional array or ArrayList.

Here is my attempt at the Strings:

cities = new ArrayList<String>();
String newCities;
newCities = (inFile.nextLine());
String[] stringArray = newCities.split(" ");
for (int i = 0; i < stringArray.length; i++){
    cities.add(stringArray[i]);
}
System.out.println(cities);

I can't figure out how to do the integer values.

Finally, this is for the implementation of a Traveling Salesman Problem so if you can think of a better way to handle this data, let me know! Thanks for your time!

Omar Ansari
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1 Answers1

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Use Scanner class instead, with its nextInt() method: 

Scanner scanner = new Scanner(YOUR_STRING_WITH_INTS);
while (scanner.hasNext()) {
     yourInt = scanner.nextInt()
     yourArrayList.add(yourInt);
}

and remember to close the scanner afterwards

scanner.close();

If you want to add this to an array, scan every line, and use an index variable to count which line it is. You know that you have 3 integers in every line, so using your index, write to adequate "row" of the table.

Eel Lee
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  • Okay so now I have a very long ArrayList of integers. I need to plot it up into a 2D Array. while (inFile.hasNextInt()){ int newCost = inFile.nextInt(); costs.add(newCost); – Omar Ansari Jul 30 '14 at 13:58
  • Scan every line, and use an index variable to count which line it is. Then write it to adequate "row" of the table. I gave you the solution, should I write all the code, too? ;-) I'll edit this answer – Eel Lee Jul 30 '14 at 14:02