import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileCopyNoBuffer{
    public static void main(String[] args){
        FileInputStream in = null;
        FileOutputStream out = null;
        Long startTime, elapsedTime;

        //String inFileStr = "C:\project\books\java-Preparation\main_docs\practice.jpg";
        //String outFileStr = "C:\project\books\java-Preparation\main_docs\practice_out.jpg";
        String fileStr = "C:\project\books\java-Preparation\main_docs\practice.jpg";

        File file = new File(fileStr);
        System.out.println("File size before - r/w is: " + file.length() + " bytes");
        try{
            in = new FileInputStream(fileStr);
            out = new FileOutputStream(fileStr);

            startTime = System.nanoTime();
            int byteRead;

            while((byteRead = in.read()) != -1){
                out.write(byteRead);
            }

            elapsedTime = System.nanoTime() - startTime;
            System.out.println("Elapsed Time is: " + (elapsedTime/1000000.0) + " msec");
            System.out.println("File size after - r/w is: " + file.length() + " bytes");

        }catch(IOException ex){
            ex.printStackTrace();
        }finally{
            try{
                if(in != null){
                    in.close();
                }
                if(out != null){
                    out.close();
                }
            }catch(IOException ex){
                ex.printStackTrace();
            }
        }


    }
}

File size before - r/w is: 1115512 bytes
Elapsed Time is: 0.040711 msec
File size after - r/w is: 0 bytes