SquareMethod.java

package Lesson2.KeyPoin1;

/**
 * Created by Юрий on 08.12.2015.
 */
public class SquareMethod {
    public static void main(String[] args) {

        square(4.0);
        square(5);
    }

    static void square(double number){
        double sqr = number * number;
        System.out.println("Square is equal to: " + sqr + " m2");
    }
    static void square(int number){
        int sqr = number * number;
        System.out.println("Square in equal to: " + sqr + ".0 m2");
    }
}

Результат должен возвращаться из метода, вывод в методе main()