java console timer

import java.io.IOException;
import java.util.Scanner;

public class Timer {

    public static String[] getCharLines(char char_) {
        switch (char_) {
        case '0':
            return new String[] { "   ___  ", "  / _ \\ ", " | | | |", " | | | |", " | |_| |", "  \\___/ ", "        ", "        " };
        case '1':
            return new String[] { "  __ ", " /_ |", "  | |", "  | |", "  | |", "  |_|", "", "" };
        case '2':
            return new String[] { "  ___  ", " |__ \\ ", "    ) |", "   / / ", "  / /_ ", " |____|", "       ", "       " };
        case '3':
            return new String[] { "  ____  ", " |___ \\ ", "   __) |", "  |__ < ", "  ___) |", " |____/ ", "        ", "        " };
        case '4':
            return new String[] { "  _  _   ", " | || |  ", " | || |_ ", " |__   _|", "    | |  ", "    |_|  ", "         ", "         " };
        case '5':
            return new String[] { "  _____ ", " | ____|", " | |__  ", " |___ \\ ", "  ___) |", " |____/ ", "        ", "        " };
        case '6':
            return new String[] { "    __  ", "   / /  ", "  / /_  ", " | '_ \\ ", " | (_) |", "  \\___/ ", "        ", "        " };
        case '7':
            return new String[] { "  ______ ", " |____  |", "     / / ", "    / /  ", "   / /   ", "  /_/    ", "         ", "         " };
        case '8':
            return new String[] { "   ___  ", "  / _ \\ ", " | (_) |", "  > _ < ", " | (_) |", "  \\___/ ", "        ", "        " };
        case '9':
            return new String[] { "   ___  ", "  / _ \\ ", " | (_) |", "  \\__, |", "    / / ", "   /_/  ", "        ", "        " };
        case ':':
            return new String[] { "    ", "  _ ", " (_)", "    ", "  _ ", " (_)", "    ", "    ", "    " };
        default:
            return new String[] { "    ", "    ", "    ", "    ", "    ", "    ", "    ", "    ", };
        }
    }

    public static String addZero(Integer number) {
        String number_ = String.valueOf(number);
        if (number <= 9) {
            number_ = "0" + String.valueOf(number);
        }
        return number_;
    }

    public static void clearTerminal() {
        try { // clear terminal
            if (System.getProperty("os.name").contains("Windows"))
                new ProcessBuilder("cmd", "/c", "cls").inheritIO().start().waitFor();
            else
                Runtime.getRuntime().exec("clear");
        } catch (IOException | InterruptedException ex) {
        }
    }

    public static void main(String[] args) {

        System.out.println("Minutes:");
        Scanner scObj = new Scanner(System.in);
        Integer minutes = scObj.nextInt();

        System.out.println("seconds:");
        Integer seconds = scObj.nextInt();
        System.out.println(minutes + ":" + seconds);
        Boolean isFinished = false;
        while (isFinished == false) {
            seconds--;
            if (seconds < 0) {
                seconds = 59;
                minutes--;
                if (minutes < 0) {
                    isFinished = true;
                    break;
                }
            }
            clearTerminal();
            String minutes_ = addZero(minutes);
            String seconds_ = addZero(seconds);
            String[][] lines = { getCharLines(minutes_.charAt(0)), getCharLines(minutes_.charAt(1)), getCharLines(':'), getCharLines(seconds_.charAt(0)), getCharLines(seconds_.charAt(1)) };
            for (Integer i = 0; i < 7; i++) {
                System.out.println(lines[0][i] + " " + lines[1][i] + " " + lines[2][i] + " " + lines[3][i] + " " + lines[4][i]);
            }
            try {
                Thread.sleep(1000);
            } catch (Exception e) {
                //
            }
        }
        System.out.println("Timer finished!");
        System.out.println("Closing now.");
        try {
            Thread.sleep(5000);
        } catch (Exception e) {
            //
        }
    }

}