New to Java

Hello folks
I made this program to compare to text files. It reads the two files and prints out the difference between them. It works with the code i commented out, and when i know the exact name of the files. But i want some kind of interaction that keeps asking for a files that exist inside the directory. But when I try to run the code that i made for that, I get a error. It seems like i can't convert the input to a string. Can anyone tell me what i'm doing wrong?
Thanks.

import java.io.*;
import java.util.*;


public class Ch6pp2
{
    public static void main(String[] args) throws FileNotFoundException
    {
    	Scanner tastatur = new Scanner(System.in);
        //calls the getInput method
        Scanner input1 = getInput(tastatur);
    	Scanner input2 = getInput(tastatur);
    	String one = input1.toString();
    	String two = input2.toString();

        //calls the compare two files method
    	compareTwoFiles(one, two);
    }
        //this method ask for a file name until it finds a file name that exist inside the directory
	public static Scanner getInput(Scanner tastatur)
    {
        Scanner result = null;
        while (result == null)
        {
            System.out.print("input file name? ");
            String name = tastatur.nextLine();
            try
            {
                result = new Scanner(new File(name));
            } catch (FileNotFoundException e)
            {
                System.out.println("File not found.  "
                                   + "Please try again.");
            }
        }
        System.out.println();
        return result;
    }    
//it works with this code for input. but only if you know the exact name to type
    /*
    	System.out.println("Enter a first file name: ");
    	Scanner tastatur = new Scanner(System.in);
        String one = tastatur.next();
        System.out.println("Enter a second file name: ");
    	Scanner tastatur2 = new Scanner(System.in);
        String two = tastatur.next(); 
        compareTwoFiles(one, two); 
*/

	
	//this method compares the two Strings
    public static void compareTwoFiles(String one, String two) throws FileNotFoundException
    {
		
		File f = new File(one);
        Scanner input = new Scanner(f);
        File g = new File(two);
        Scanner input2 = new Scanner(g);
		
		int count = 1;
		String text = "";
		String textSecond = "";
		System.out.println("Difference found:");
		while (input.hasNextLine())
		{
			text = input.nextLine();
			textSecond = input2.nextLine();	
			if (!text.equals(textSecond))	
			{
				System.out.println("Line " + count + ":");
				System.out.println("< " + text);
				System.out.println("> " + textSecond);
				System.out.println();				 
			}	
			count++; 
		}
				
		
	}
}