package ru.alexandr;

/**
 * Calculate.
 *
 * @autor Alexandr Golubev (deed27@narod.ru)
 * @version $Id$
 * @since 0.1
 */

public class Calculate {
	/**
	 * Main.
	 * @param args - args.
	 */
    public static void main(String[] args){
	System.out.println("Hello world!");
    }
}
package ru.alexandr;

/**
 * Calculate.
 *
 * @autor Alexandr Golubev (deed27@narod.ru)
 * @version $Id$
 * @since 24.11.2016
 */

public class Calculate {
	/**
	 * Main.
	 * @param args - args.
	 */
    public static void main(String[] args){
	System.out.println("Hello world!");
    }
}
add Calculate.java