How to add lines with name and date when converting file to upper case?

Question

I am trying to get my program to read input from a .txt file and then convert the input to uppercase letters.

/*
 * 2/16/24
 * Purpose of this program is to convert contents of a file to upper case letters.
 */


package UpperCaseFileConverter;
//import
import java.io.File;
import java.io.*;
import java.util.Scanner;

public class UpperCaseFileConverter {

    public static void main(String[] args) throws IOException 
    {    
        Scanner scanner=new Scanner(System.in);
        
        String userFileName;
          
        // get file name (my file name is going to be convert.txt for this example)
        System.out.print(" Enter the Filename: ");
        userFileName = scanner.nextLine();
               
        // open file        
        File file = new File(userFileName);
        
        while(!file.exists()) {
             System.out.print(userFileName+"does not exists. Please re-enter the file name\n"
             + "remember for this example we are using \"convert.txt\"" );
             userFileName = scanner.nextLine();
             file = new File(userFileName);
        }
        
        Scanner fileToScan = new Scanner(file);
        PrintWriter fileToWrite = new PrintWriter("convertToUpper.txt");
        //Test file
        while(fileToScan.hasNext()) {
            System.out.println(fileToScan.nextLine().toUpperCase());
        //Write file to new .txt file   
        }
        while(fileToScan.hasNext()) {
        fileToWrite.println( fileToScan.nextLine().toUpperCase());
        }
        System.out.println("Contents have been converted to upper case and saved in convertToUpper.txt");
       fileToWrite.close();
       fileToScan.close();
        
    }
    

    }

I need the program to add a new line to the file that has my name, and then add to the end of the file the date, so the output should have 2 more lines than the input.

In my class and the text book for Java I simply have not been taught how to add to specific lines of a document, so I don't know how I would add to the first line... Either that or I'm and idiot and missed that part.

Answer 1

/* xxxxx
 * 2/16/24
 * Purpose of this program is to convert contents of a file to upper case letters.
 */


package xxxxxUpperCaseFileConverter;
//Import
import java.io.*;
import java.util.Scanner;

public class xxxxxUpperCaseFileConverter {

    public static void main(String[] args) throws IOException 
    {  
        //Create scanner for keyboard input from user 
        Scanner scanner=new Scanner(System.in);
        
        //Create string name to hold user input
        String userFileName;
        
        //Get file name (my file name is going to be convert.txt for this example)
        System.out.print(" Enter the Filename: ");
            userFileName = scanner.nextLine();
               
        // Specify file        
        File file = new File(userFileName);
        
        //Error message
        while(!file.exists()) {
             System.out.print(userFileName+" does not exists. Please re-enter the file name\n"
             + "remember for this example we are using \"convert.txt\"" );
             userFileName = scanner.nextLine();
             file = new File(userFileName);
        }
        
        //Create output file and create a Scanner to read from the input file 
        PrintWriter fileToWrite = new PrintWriter("convertToUpper.txt");  
        
        try (Scanner fileToScan = new Scanner(file)) {
            fileToWrite.println("XXXXX XXXXX");
            System.out.println("XXXXX XXXXX);
            while (fileToScan.hasNextLine()) {
                String line = fileToScan.nextLine();
                String upperCaseLine = line.toUpperCase();                
                fileToWrite.println(upperCaseLine);                
                //print the converted line to the console                
                System.out.println(upperCaseLine);                
            }
            fileToWrite.println("02,19,2024");
            System.out.println("02,19,2024");
        }

        //Confirm message
        System.out.println("Contents have been converted to upper case, Name and date have been added. New data saved in convertToUpper.txt");
        //Close input and output files.
       fileToWrite.close();      
        
    }
}

This seemed to work. It is based on the input from the other answers here. It writes output to a .txt document verified and data tested to console.