import java.io.*;

  public class CopyDirectory{

public static void main(String[] args) throws IOException{

   CopyDirectory cd = new CopyDirectory();
    BufferedReader in = new BufferedReader
                        (new InputStreamReader(System.in));
    System.out.println("Enter the source directory or file name : ");

      String source = in.readLine();

    File src = new File(source);
  
    System.out.println("Enter the destination directory or file name : ");
    String destination = in.readLine();
  
      File dst = new File(destination);

    cd.copyDirectory(src, dst);

  }
  

  public void copyDirectory(File srcPath, File dstPath)
                               throws IOException{
  
  if (srcPath.isDirectory()){

      if (!dstPath.exists()){

        dstPath.mkdir();

     }


     String files[] = srcPath.list();
  
    for(int i = 0; i < files.length; i++){
        copyDirectory(new File(srcPath, files[i]),
                     new File(dstPath, files[i]));
  
      }

    }

   else{
  
      if(!srcPath.exists()){

        System.out.println("File or directory does not exist.");

       System.exit(0);

      }
      
else
  
      {

       InputStream in = new FileInputStream(srcPath);
       OutputStream out = new FileOutputStream(dstPath);
                     // 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();

      }

   }
  
System.out.println("Directory copied.");

}

}