import java.io.*;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import java.util.Scanner;

public class UseFiles {	
	/*	How to copy Files */
	
	// Copy file as character Stream
	public static void copyCharacters (String fromFile, String toFile) throws IOException {
		File inputFile = new File(fromFile);
		File outputFile = new File(toFile);
		FileReader in = new FileReader(inputFile);
		FileWriter out = new FileWriter(outputFile);
		int c;
		while ((c = in.read()) != -1)
			out.write(c);
		in.close();
		out.close();
	}
	
	// Copy file as byte Stream
	public static void copyBytes (String fromFile, String toFile) throws IOException {
		File inputFile = new File(fromFile);
		File outputFile = new File(toFile);
		FileInputStream  in = new FileInputStream(inputFile);
		FileOutputStream out = new FileOutputStream(outputFile);
		int c;
		while (( c = in.read()) != -1)
			out.write(c);
		in.close();
		out.close();
	}
	
	// Copy text file 
	public static void copyText (String fromFile, String toFile) throws IOException {
		File inputFile = new File(fromFile);
		File outputFile = new File(toFile);
		BufferedReader in = new BufferedReader(new FileReader(inputFile));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(outputFile)));
		String c;
		while ((c = in.readLine()) != null)
			out.println(c);
		in.close();
		out.close();
	}

	public static void main(String[] args) {
		try {
			  String s = File.separator;
			  String d1 = "C:"+s+"examples"+s+"students"+s+"source_files";
			  File sourceDir = new File(d1);

			  String d2 = "C:"+s+"examples"+s+"students"+s+"target_files";
			  File targetDir = new File(d2);

			  // Copy file in sourceDir
			  String source = "C:"+s+"examples"+s+"students"+s+"source_files"+s+"proba1.txt";
			  String target = "C:"+s+"examples"+s+"students"+s+"source_files"+s+"proba1_new.txt";
			  copyBytes(source,target);

			  // List of files in sourceDir
			  File[] files = sourceDir.listFiles();
			  String[] fileNames = sourceDir.list();

			  //Moving files
			  for (int i = 0;i < files.length;i++)
			     files[i].renameTo(new File(targetDir,files[i].getName()));

			}
		catch (IOException e) {
			    System.err.println(e.toString());
		}
	}
}