8 task

package com.company;

import com.company.ArrayUtils;
import com.company.SwingUtils;
import java.util.Locale;
import java.util.Scanner;


public class Program {

    public static void main(String[] args) throws Exception {
        //SwingUtils.setLookAndFeelByName("Windows");
        if (args.length == 0) {
            Locale.setDefault(Locale.ROOT);
            //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            SwingUtils.setDefaultFont("Times New Roman", 16);

            /* Create and display the form */
            java.awt.EventQueue.invokeLater(() -> new FrameMain().setVisible(true));
        }
        else  {int[][] matrix = ArrayUtils.readIntArray2FromFile(args[0]);
        String[][] arr2;
        arr2 = Task.solution(matrix);
        if (args.length==1) {
                System.out.print("Print file name to save: ");
                String fileName;
                Scanner scn = new Scanner(System.in);
                fileName = scn.nextLine();
            if (!fileName.toLowerCase().endsWith(".txt")) {
                fileName += ".txt";
            }
                ArrayUtils.writeArrayToFile(fileName, arr2);
            }
        if (args.length == 2) ArrayUtils.writeArrayToFile(args[1], (arr2));
        else System.err.print(-1);
        }
    }
}