Java，从input.txt读取文件有问题

Question

I am working on the project. For my purpose, I need to use them that find the median of medians.

At my point, I need to see the read

I also created the input.txt like that below

3 7
1 4 5 7 9 11 13

Below the snippet, I created the variable for the readpath.

// need the variable of filename to read
    private static final String INPUT_FILE_PATH = "input.txt";

So, then I appended the code that needs to read the numerical integers in the input.txt in the main function as known below

public static void main(String args[]){
        // read the input file
        // TODO need to fix this readpath that gets the bad input
        // ! ASAP
        Path inputPath = Paths.get(INPUT_FILE_PATH);
        Charset charset = Charset.forName("UTF-8");
        List<String> fileLines = new ArrayList<>(0);
        try {
            fileLines = Files.readAllLines(inputPath, charset);
        } catch (IOException ex) {
            System.err.println("Error reading file: " + ex.getMessage());
            System.exit(1);
        }
        int read_line = 0;
        try {
            read_line = Integer.parseInt(fileLines.get(0));
        } catch (NumberFormatException ex) {
            System.err.println("bad file input");
            System.exit(1);
        }
        System.out.println("reading... " + read_line);
        // end of reading the filename operation
}

As a result, this code suppose to work. I get the output that is bad file input. I do not understand why it gets bad file. By the way, I put all files together in the same directory.

Answer 1

    int read_line = 0;
    int read_line2 = 0;
    try {
        String[] words = fileLines.get(0).split("\\s+"); // Split on whitespace.
        read_line = Integer.parseInt(words[0]);
        read_line2 = Integer.parseInt(words[1]);
    } catch (NumberFormatException ex) {
        System.err.println("bad file input - not a number; " + e.getMessage());
        System.exit(1);
    }

The line contains two numbers, and results in a NumberFormatException.

Answer 2

I am working on the project. For my purpose, I need to use them that find the median of medians.

At my point, I need to see the read

I also created the input.txt like that below

3 7
1 4 5 7 9 11 13

Below the snippet, I created the variable for the readpath.

// need the variable of filename to read
    private static final String INPUT_FILE_PATH = "input.txt";

So, then I appended the code that needs to read the numerical integers in the input.txt in the main function as known below

public static void main(String args[]){
        // read the input file
        // TODO need to fix this readpath that gets the bad input
        // ! ASAP
        Path inputPath = Paths.get(INPUT_FILE_PATH);
        Charset charset = Charset.forName("UTF-8");
        List<String> fileLines = new ArrayList<>(0);
        try {
            fileLines = Files.readAllLines(inputPath, charset);
        } catch (IOException ex) {
            System.err.println("Error reading file: " + ex.getMessage());
            System.exit(1);
        }
        int read_line = 0;
        try {
            read_line = Integer.parseInt(fileLines.get(0));
        } catch (NumberFormatException ex) {
            System.err.println("bad file input");
            System.exit(1);
        }
        System.out.println("reading... " + read_line);
        // end of reading the filename operation
}

As a result, this code suppose to work. I get the output that is bad file input. I do not understand why it gets bad file. By the way, I put all files together in the same directory.