import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class ReaderWriterExample {
    public static void main(String[] args) {
        String inputFile = "input.txt";     // File to read from
        String outputFile = "output.txt";   // File to write to

        try (FileReader reader = new FileReader(inputFile);
             FileWriter writer = new FileWriter(outputFile)) {

            int character;

            // Read each character and write it to the output file
            while ((character = reader.read()) != -1) {
                writer.write(character);
            }

            System.out.println("Content copied successfully using FileReader and FileWriter.");

        } catch (IOException e) {
            System.out.println("Error: " + e.getMessage());
        }
    }
}

/*
Count Characters in a Fil
while (reader.read() != -1) {
                charCount++;
*/
/*
Convert File Content to Uppercase

while ((ch = reader.read()) != -1) {
                writer.write(Character.toUpperCase((char) ch));
            }
*/
/*
Append Text to a Fil
FileWriter writer = new FileWriter(filePath, true) { // true means append at end of file
            writer.write(textToAppend);
}
*/
/*
Replace Specific Word in a File
 String line;
            while ((line = reader.readLine()) != null) {
                writer.write(line.replaceAll(target, replacement));
                writer.newLine();
            }
*/