从 String[] Java 解析整数对

Question

How would I go about parsing pairs of integers after the first string in a string array. In my while loop below, i've assigned the letter 'A','B','C', but now I'm trying to assign pairs of numbers to a class input eg. class X(int i, int j), does anyone have any tips of what to do from here?

An example input would be : 
A 32 12 34 12 
B 12 22 11 11
C 1  4   1  2

 public static void readFile(String f) throws IOException {
            BufferedReader in = new BufferedReader(new FileReader(f));
            String line;
            String[] str;
            Scanner s;
            try {

                line = in.readLine();
                s = new Scanner(line);
                int number = s.nextInt();
                if (s.hasNextInt()) {
                    number = s.nextInt(); 
                } 
                s.close();
                line = in.readLine(); 
                numLines = Integer.parseInt(line);

                while((line = input.readLine())!=null){
                      String[] pair = line.split(" ");
                      String letter;        
                      letter = pair[0];
                  }

                if (!numLines.equals(lineCount)) { 
                System.exit(0);
                }           
            } catch (Exception e) {
            } finally {
                in.close(); 
            }
        }

Answer 1

You need to split the line and then parse individual numbers.

Something like this:

String[] a = {"A 32 12 34 12","B 12 22 11 11", "C 1  4   1  2"};
    
for (String s: a) {
    String[] line = s.split("\\s+");
    
    for (int i = 1; i < line.length; i++) {
        System.out.print(Integer.parseInt(line[i]) + " ");
    }
    System.out.println();
}

Output:

32 12 34 12

12 22 11 11

1 4 1 2

For the sake of example, I am using array to show how it works. You can make changes based on your requirements. You note in question something about class x(...) but nothing in your code shows that so I won't bother to show something that I don't understand.

Demo