import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

class Cat {
    public static void main(String[] args) {
        if (args.length >= 1) {
            String filename = args[0];
            try {
                // FileNotFoundException can be raised
                Scanner s = new Scanner(new File(filename)); 
                while (s.hasNextLine()) {
                    System.out.println(s.nextLine());
                }
                s.close();
            } catch (FileNotFoundException e)  {
                System.out.println("File not found!");
            }
        } else
            System.out.println("Usage: java Cat <filename>");
    }
}