Java example

import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class JavaClassOne {

    public static void main(String[] args) throws IOException {

        String currentDir = new File(".").getCanonicalPath();
        List<List<Float>> data = new ArrayList<>();

        // wczytanie danych
        try (BufferedReader br = new BufferedReader(new FileReader(currentDir + "/src/moj_plik_tekstowy.txt"))) {
            String line;
            while ((line = br.readLine()) != null) {
                String[] values = line.replace("    ",";").split(";");
                Float[] floats = new Float[values.length];
                for (int i = 0; i < values.length; i++) {
                    floats[i] = Float.parseFloat(values[i].replace(",", "."));
                }
                data.add(Arrays.asList(floats));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }


        // wyświetlenie danych
        for (var line : data) {
            for (var value : line) {
                System.out.print(value + " ; ");
            }
            System.out.println("");
        }
    }
}