Всем привет, как автоматическии считывать новое имя файла? ниже задача в которой нужно считать.

package readability;
import java.io.*;
import java.util.*;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
    	String data = "";
			try {
			File myObj = new File("./input.txt");
			Scanner myReader = new Scanner(myObj);
			System.out.println("Java Main " + myObj.getName());
			System.out.println("The text is :");
			while (myReader.hasNextLine()) {
			 data = myReader.nextLine();
			System.out.println(data);
			}
			myReader.close();
			} catch (FileNotFoundException e) {
			System.out.println("An error occurred.");
			}

			System.out.println();

			int countWords = data.split(" ").length;
			System.out.println("Words: " + countWords);

			int countSc = data.split("[!?.:]+").length;
			System.out.println("Sentences: " + countSc);

			int countCh = data.replace(" ", "").length();
            System.out.println("Characters: " + countCh);

            double score = 4.71 * countCh/countWords + 0.5 * countWords/countSc - 21.43;
            double d = (Double)Math.floor(score*100)/100.0;
            System.out.println("The score is: " + d);
            int ab = (int)Math.ceil(d);

            String age = "";
            switch (ab) {
            	case 1:
            		age = "5-6";
            		break;
            	case 2:
            		age = "6-7";
            		break;
            	case 3:
            		age = "7-9";
            		break;
            	case 4:
            		age = "9-10";
            		break;
            	case 5:
            		age = "10-11";
            		break;
            	case 6:
            		age = "11-12";
            		break;
            	case 7:
            		age = "12-13";
            		break;
            	case 8:
            		age = "13-14";
            		break;
            	case 9:
            		age = "14-15";
            		break;
            	case 10:
            		age = "15-16";
            		break;
            	case 11:
            		age = "16-17";
            		break;
            	case 12:
            		age = "17-18";
            		break;
            	case 13:
            		age = "18-24";
            		break;
				case 14:
            		age = "24+";
            	default:
            		age = "no argument passed";

            }

            System.out.println("This text should be understood by " + age + " year olds.");

    }
}