need hint
package com.codegym.task.task13.task1326;
/*
Sorting even numbers from a file
*/
import java.awt.*;
import java.io.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
InputStream in = new FileInputStream(reader.readLine());
Set<Integer> set = new HashSet<>();
ArrayList<Integer> integers = new ArrayList<Integer>();
ArrayList<Integer> even = new ArrayList<Integer>();
while(true){
Integer a = in.read();
integers.add(a);
if(a == null)
break;
}
in.close();
for(int i = 0; i<integers.size(); i++){
if(integers.get(i)%2==0){
even.add(integers.get(i));
}
}
Collections.sort(even);
for (int i = 0; i<even.size(); i++){
System.out.println(even.get(i));
}
//write your code here
}
}