Java program for create backup file

• Students Tutorial

FileBackupCreate.java

import java.util.*;
import java.io.*;
class FileBackupCreate 
{
	public static void main(String[] args) throws FileNotFoundException, IOException
	{
		
		FileInputStream fis = null;
		FileOutputStream fos = null;
		int fileSize = 0, data = 0;
        
		
		fis = new FileInputStream(args[0]);

		
		fileSize = fis.available();
		if (fileSize == 0)
		{
			System.out.println("Sorry, this file is empty.");
			fis.close();
			return;
		}

		
		fos = new FileOutputStream(args[0] + ".bak");

		while ( (data = fis.read()) != -1)
		{
			fos.write(data);
		}

		
		fos.flush();

        System.out.println("Backup file craeted successfully.");
		
		fos.close();
		fis.close();
	}
}