15. Create an empty file

import java.util.*;

public class App {

    public static void main(String[] args) {

        final Formatter x;      // It outputs a string
        try{
            x = new Formatter("Fred.txt");
            // If it doesn't exist, it will automatically create a new file with this name
            System.out.println("You created a file!");
        }
        catch (Exception e){
            System.out.println("You have got an error");
        }

    }

}