Reading Input

Question

I'm having a bit of trouble reading two forms of input. The input is essentially the components of a directed graph.
The first method of input is through a text file. The file is to be formatted like this:
10
15
2 4
3 5
4 8
1 2
The first number is the dimension of the two dimensional graph (in this case a 10 x 10 graph). The second number is the number of paths in the graph. The rest are the coords of the paths in the graph. This isn't so much important as getting these values into an array that I can call through this function.
Here's my unfinished code:
public static void readFromFile(){
          int data = 0;
          int amount = 0;
          StringBuffer datalist = new StringBuffer(amount);
          try{
               Scanner file_scan = new Scanner(new File("graph.txt"));
               while(file_scan.hasNext()){
                    data = file_scan.nextInt();
                    // System.out.println(data);     // This line is here for debugging purposes
                    datalist.append((int)data);
                    amount++;
                    // System.out.println(data);     // So is this one
                    System.out.print(datalist.charAt(amount) + " ");
          catch(Exception e){
               System.out.println("Error: Bad File Input.");
               System.exit(0);
                // Stringbuffer is read into array
                // array is returned
}SInce the text file is always in the same format, the values will be easy to sort once I get them into the array. But I can't get them into the array. Help!
The second for of input is manual. The problem isn't so much as reading the integers but reading them correctly. The way the user inputs the coords of each path is like this:
Enter Edge: 2 3
Enter Edge: 3 5
My question is how to distinguish the integers. I've managed to read them into strings, but how do I separate the integers? using parseInt(), maybe? Please help!

Answer 1

Here I am replying to myself, a testament to how one can learn from their own idiocy. I'm (to my knowledge) inventing a new acronym: lolas (laughs out loud at self).
First off, the second value of the text file will be the size of an array needed to hold all of the vertices. So, what I should do is read the first two lines of the file outside of the loop since they will always be there. THEN I should enter into the loop while(file_scan.hasNext()) and put all of the values into the array which I can then return.
Secondly, nextInt() reads the next integer of the file. So, as I read it I can put it into an array similar to the method I used for the text file input. It all seems so clear now when it's not approaching 1:00am and I'm not panicking and frustrated.