Square.java

package com.company;

/**
 * Created by admin on 23.10.2018.
 */
public class Square extends flat_geometric_shape {
    protected double length;

    public Square(double len, String nameFigure) throws IllegalArgumentException
    {
        super(nameFigure);
        if(len <= 0)
            throw new IllegalArgumentException("Длина стороны квадрата <= 0");
        this.length = len;
    }

    @Override
    public void S()
    {
        S = length*length;
    }

    @Override
    public void P()
    {
        P = 4*length;
    }
}