import java.io.*;

public class CopyMultipleFiles{
	public static void main(String[] args)throws IOException {
		BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
		System.out.println("Enter Number of files that have to be coppied:");
		int n = Integer.parseInt(bf.readLine());
		String fileName[] = new String[n];
		for (int i=0; i<n; i++){
			System.out.println("Enter file name:");
			fileName[i] = bf.readLine();
		}
		for (int j=0; j<n-1; j++){
			copyfile(fileName[j],fileName[j+1]);
		}
		System.out.println("File copied.");
  }

  public static void copyfile(String srFile, String dtFile){
    try{
      File f1 = new File(srFile);
      File f2 = new File(dtFile);
      InputStream in = new FileInputStream(f1);
      //For Append the file.
      OutputStream out = new FileOutputStream(f2,true);

      //For Overwrite the file.
//      OutputStream out = new FileOutputStream(f2);

      byte[] buf = new byte[1024];
      int len;
      while ((len = in.read(buf)) > 0){
        out.write(buf, 0, len);
      }
	  in.close();
	  out.close();
    }
    catch(FileNotFoundException ex){
      System.out.println(ex.getMessage() + " in the specified directory.");
      System.exit(0);
    }
    catch(IOException e){
      System.out.println(e.getMessage());   
    }
  }
}