Java Program

Why is the output txt not being written in reverse?

It is just writing the same text that is in my input file and I need it to be reversed.

the program needs to function as follows

/*Write a program that reads a file containing text. Read each line and send it to the
	output file, preceded by line numbers. If the input file is
	Mary had a little lamb
	Whose fleece was white as snow.
	And everywhere that Mary went,
	The lamb was sure to go!
	then the program produces the output file
	1 Mary had a little lamb
	2 Whose fleece was white as snow.
	3 And everywhere that Mary went,
	4 The lamb was sure to go!

My code is below.

Thanks

but it is just repeating what is in the input file

public class Reverse { static String INPUT_FILE_NAME = "C:\\Users\\sarah\\OneDrive\\Documents\\input.txt"; static String OUTPUT_FILE_NAME = "C:\\Users\\sarah\\OneDrive\\Documents\\output.txt"; public static void main(String[] args) throws IOException { ArrayList listLines = ReadFile(); System.out.println("Before Reverse Order, ArrayList Contains : " + listLines); Collections.reverse(listLines); System.out.println("Before Reverse Order, ArrayList Contains : " + listLines); WriteFile(listLines); } public static void WriteFile(ArrayList listLines) throws IOException { try { try (BufferedWriter out = new BufferedWriter(new FileWriter(OUTPUT_FILE_NAME))) { for (int i = 0; i < listLines.size(); i++) { out.write(listLines.get(i).toString()); out.newLine(); } } } catch (Exception exp){ System.err.println(""+ exp.getMessage()); } } public static ArrayList ReadFile() throws IOException { ArrayList listLines = new ArrayList(); try (BufferedReader br = new BufferedReader(new FileReader(INPUT_FILE_NAME))) { String line = br.readLine(); while (line != null) { listLines.add(line); line = br.readLine(); } } catch(Exception exp){ System.err.println(""+ exp.getMessage()); } return listLines; } }