Текстовые файлы с числовой информацией

List<String> text = new ArrayList<>();
try (Stream<String> lines = Files.lines(Paths.get("input.txt"))) {
   text = lines.collect(Collectors.toList());
} catch (IOException ex) {
   ex.printStackTrace();
}
text.forEach(System.out::println);

String one = "one", two = "two";
String result = String.join(" ", one, two);
System.out.println(result);

try(FileWriter writer = new FileWriter(new File("out.txt"))){
    writer.write("some string");
} catch (IOException ex){
    ex.printStackTrace();
}

public class Main {
 
    public static void main(String[] args) {
        List<String> text = new ArrayList<>();
        try (Stream<String> lines = Files.lines(Paths.get("input.txt"))) {
            text = lines.collect(Collectors.toList());
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        text.forEach(System.out::println);
 
    }
    String one = "one", two = "two";
    String result = String.join(" ", one, two);
    System.out.println(result);
 
    try(FileWriter writer = new FileWriter(new File("out.txt"))){
        writer.write("some string");
    } catch (IOException ex){
        ex.printStackTrace();
    }
}