Thread: Prompting user to open file, then printing in System.out using toUpperCase

The assignment instructions themselves are quite vague, but here is what is needed:

"Using a JFileChooser, prompt the user for a file to open. Using a Scanner, read one line from this file
at a time, until the end, printing out each line in upper case to System.out."

I take it he means a .txt file. So if "I like cats" is in the .txt file I would have to get it to print through System.out as "I LIKE CATS", correct? If so, I'm having a bit of trouble. I'm able to prompt the user to open a file, but I'm not exactly sure how I would go about getting it to print in all uppercase characters. Here's what I have so far:

import javax.swing.JFileChooser;
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException; 
public class Program2
{
    public static void main (String[] args) throws FileNotFoundException
    {
        JFileChooser chooser = new JFileChooser();
        Scanner in = null;
        if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) 
        {
            File selectedFile = chooser.getSelectedFile();
            in = new Scanner(selectedFile);
 
            while(in.hasNextLine())
            {
                String str = new String(in.nextLine());
                System.out.println(str.toUpperCase());
            }
        }
    }
}

Thanks for the help in advance.

Edit: Solved. All I had to do was put the Scanner in a String object so I could gain access to the toUpperCase() method. Updated code to signify this just in case anyone else was having the same problem.