FileIO.java

import java.io.FileInputStream;
import java.io.FileOutputStream;

public class FileIO {
    public static void main(String[] args) {
        String sentense = null;
        try (FileInputStream fileInputStream = new FileInputStream("input.txt")) {
            byte[] data = new byte[fileInputStream.available()];
            System.out.println("Number of available bytes: " + fileInputStream.available());
            sentense = new String(data);
            int bytesRead = fileInputStream.read(data);
            System.out.println("Number of bytes read: " + bytesRead);
            String content = new String(data);
            System.out.println("File content:\n" + content);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            System.out.println("File operation completed.");
        }
        try (FileOutputStream fileOutputStream = new FileOutputStream("output.txt")) {
            byte[] dataO = sentense.getBytes();
            System.out.println("Number of bytes to write: " + dataO.length);
            fileOutputStream.write(dataO);
            System.out.println("Data written to output.txt successfully.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}