Java file read to array, use collections to sort if needed. Just a sample

file1.txt

10
20
30
100 200
1001
221

filetoarray.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
public class filetoarray {
    public static void main(String[] args) {
        Scanner file = null;
        ArrayList<Integer> list = new ArrayList<Integer>();
        
        try {
            file = new Scanner(new File("file1.txt"));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        
        while(file.hasNext()){
            if (file.hasNextInt())
                list.add(file.nextInt());
            else file.next();
        }
        
        for (Integer i: list)
            System.out.println(i);
        
    }
}