Hi i have a txt file with loads of numbers each number is randomly scattered across the file and when i read the file in as a string and try to subdivide it into individual numbers in an array i get the issue of ie my file contains

         1234

         3467


         22222

i didvide the numbers into string array String sub[] however every number goes into sub[0] ie sub[0] = 1234 3467 22222

whereas my desired output for sub[0] would be 1234 my code is below `

File file = new File(s);
        String gg;
        try {
            Scanner in = new Scanner(file);
            while (in.hasNext()) {
                gg = in.nextLine();

                // String temp = gg.replaceAll("\\s*[\\r\\n] \\s*", "").trim();
                String temp = gg.replace('\n', ' ');
                String[] sub = temp.split(" ");
                System.out.println(sub[0]);

`

and the output im getting for sub[0] is a whole bunch of numbers when i only want one which in above example it should be 1234

the comment is one of the ways i tried i also tried using .replaceall the char one '\n' but it didnt work and .replaceall "\s"

CodePudding user response：

Your code (from what I can see) should work fine - you are trying to split a line on the " " character - but it is only a single line...

    public static void main (String[] args) throws FileNotFoundException{
        File file = new File("numbers.txt");
        Scanner in = new Scanner(file);
        String gg = "";
        while (in.hasNext()) {
            gg = in.nextLine().trim();  // <- trim of whitespace
            System.out.println(gg);

            // maybe the line is all blank ??? best to check

            // convert the number to an int here...

            // determine min/max/average - need some variables :)

        }
    }

CodePudding user response：

put string array outside scope of while loop i assumed length is 3 btw replace this with whatever it is

String line;
        String sub[] = new String[100];

        try {
            while((line = buffread.readLine()) != null) {
                int i=0;
                sub[i] = line;
                i  ;
            }
            System.out.println(sub[0]);

        }

output is 1234