Copy Text File to Another File

[gcclinux]

Hi, I was wondering if someone can advise why my file copy is not working, I am sure it is somethng very symple but I just can't figure it out.

public class CopyLog {
  
        File f1 = new File("C:\\Temp\\original_file.txt");
        File f2 = new File("C:\\Temp\\copied_file.txt");

        void copy(File f1, File f2) throws IOException {
        InputStream in = new FileInputStream(f1);
        OutputStream out = new FileOutputStream(f2);

        // Transfer bytes from in to out
        byte[] buf = new byte[1024];
        int len;
        while ((len = in.read(buf)) > 0) {
        out.write(buf, 0, len);
    }
    in.close();
    out.close();
}
}

Many Thanks

[sunde887]

might be easier to wrap the data streams in a printwriter and a buffered reader. Then you can just read line with the buffered reader, store it in a string, and then use the printwriter to write to the new file.

What happens when you run this? Errors? nothing?

[gcclinux]

Hi, with a couple of bit of modifications I managed to sort it out, still using my method, but thank you for the suggestion.

public class CopyLog {
  
       public static void main(String[] args) throws IOException {
            File f1 = new File("C:\\Temp\\output_file.txt");
            File f2 = new File("C:\\Temp\\copied_file.txt");

            InputStream in = new FileInputStream(f1);
            OutputStream out = new FileOutputStream(f2);

            // Transfer bytes from in to out
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
        in.close();
        out.close();
        
        String text = "Copied output_file.txt";
        System.out.println(text);
    }
}