I have no idea what the problem is.
package pl.codegym.task.task13.task1326;
/*
Sortowanie liczb parzystych z pliku
*/
import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String nazwaPliku = reader.readLine();
FileInputStream fileInputStream = new FileInputStream(nazwaPliku);
ArrayList<Integer> lista = new ArrayList<>();
while (fileInputStream.available() > 0){
if(fileInputStream.read()%2==0){
int data = fileInputStream.read();
lista.add(data);
}
}
Collections.sort(lista);
for(Integer x : lista){
System.out.println(x);
}
fileInputStream.close();
}
}