Java 1 help needed

Need help to figure out what goes into the /**, thank you

public class Comments {

/**

*

* @param date

* @return

*/

public static boolean isLeapYear(int date) {

if (date % 4 == 0) {

return true;

} else {

return false;

}

}

/**

*

* @param first

* @param initial

* @param last

* @return

*/

public static String formatName(String first, char initial, String last) {

return first + " " + initial + ". " + last;

}

/**

*

* @param radius

* @return

*/

public static double areaCircle(double radius) {

return Math.PI * radius * radius;

}

/**

*

* @param args

*/

public static void main(String[] args) {

//assume rest of the program here

}

}