Что не нравтися валидатору?
public class Solution {
public static void main(String[] args) {
// напишите тут ваш код
StringBuilder string = new StringBuilder();
ArrayList<Integer> numbers = new ArrayList<>();
try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
String fileName = reader.readLine();
try (FileInputStream fileInputStream = new FileInputStream(fileName)) {
int data;
while ((data = fileInputStream.read()) != -1) {
if (((char) data) != '\n' && ((char) data) != '\r')
string.append((char) data);
else {
try {
int num = Integer.parseInt(string.toString());
if (num % 2 == 0) {
numbers.add(num);
}
} catch (NumberFormatException ignored) {
}
string = new StringBuilder();
}
}
} catch (IOException e) {
}
} catch (IOException e) {
}
Collections.sort(numbers);
numbers.forEach(System.out::println);
}
}