Java question about reading an input file and writing it to an output file.

I see lots of questions on here about reading numbers from an input file.

I just want to read line by line.

I can get it to read fine and then I have it show in the console perfectly.

I am trying to use these 2 lines of code to capture that info before it is sent to console, and instead send it to a file, "opt.txt"

~ PrintStream out = new PrintStream(new FileOutputStream("opt.txt"));

~ System.setOut(out);

I get no errors, but the screen just flashes and I get no output in console and I get no "otp.txt" file.

If I remove those 2 lines, it outputs perfectly to console.

Here is my code. "inp.txt" is a file local to the project with numbers, letter, and spaces.

###

import java.io.*;

public class ReadLines

{

public static void ReadLines(File f) throws IOException

{

PrintStream out = new PrintStream(new FileOutputStream("opt.txt"));

System.setOut(out);

FileReader fr = new FileReader(f);

BufferedReader br = new BufferedReader(fr);

String line;

while((line = br.readLine()) != null)

{

System.out.println(line);

}

br.close();

fr.close();

}

public static void main(String[] args)

{

File f = new File ("inp.txt");

try

{

ReadLines(f);

}

catch(IOException e)

{

e.printStackTrace();

}

}

}