lab2

package com.company;


import java.io.*;
import java.nio.charset.StandardCharsets;

public class Main {

    public static void main(String[] args) {
        Room salon = new Room("Salon", 4.00f, 4.00f, 4.00f);
        Room kitchen = new Room("Kitchen", 2.00f, 2.00f, 4.00f);
        Room bedroom = new Room("Bedroom", 3.00f, 3.00f, 4.00f);
        Room[] rooms = new Room[]{salon, kitchen, bedroom};
        for (Room room : rooms) {
            room.displayInformation();
            System.out.println("Painting price: " + room.getPaintingPrice(12.15f) + "PLN");
            System.out.println("Floor price: " + room.getFloorPrice(8.15f) + "PLN");
            System.out.println();
        }
        boolean adding = true;
        while (adding){
            try {
                addRoomFromConsoleToFile();
                adding = false;
            } catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }
    }

    private static void addRoomFromConsoleToFile() throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter writer = new PrintWriter("rooms.txt", StandardCharsets.UTF_8);
        System.out.println("Give room name:");
        String name = validName(reader.readLine());
        System.out.println("Give room dimensions in comma-separated list(length,width,height):");
        String[] dimensions = validList(reader.readLine().split(","));
        System.out.println("Give price for paint:");
        float priceForPaint = validPrice(reader.readLine());
        System.out.println("Give price for floor:");
        float priceForFloor = validPrice(reader.readLine());
        Room newRoom = new Room(
                name,
                Float.parseFloat(dimensions[0]),
                Float.parseFloat(dimensions[1]),
                Float.parseFloat(dimensions[2])
        );
        newRoom.writeToFile(writer, priceForPaint, priceForFloor);
    }

    private static String[] validList(String[] list) {
        for (String number : list) {
            if (Float.parseFloat(number) <= 0.0f) {
                throw new IllegalArgumentException("Dimensions must be greater then zero");
            }
        }
        if(list.length != 3){
            throw new IllegalArgumentException("Missing dimensions in list");
        }
        return list;
    }

    private static String validName(String name){
        if(name.length() == 0){
            throw new IllegalArgumentException("Name is required");
        }
        return name;
    }

    private static Float validPrice(String price){
        if(Float.parseFloat(price)<= 0.0f){
            throw new IllegalArgumentException("Price must be greater then zero");
        }
        return Float.parseFloat(price);
    }
}

package com.company;

import java.io.PrintWriter;

class Room {
    String name;
    float height;
    float width;
    float length;

    Room(String name, float length, float width, float height) {
        this.name = name;
        this.length = length;
        this.width = width;
        this.height = height;
    }

    float getVolume() {
        return this.height * this.width * this.length;
    }

    float getWallsSurface() {
        return (this.width * this.height + this.length * this.height) * 2;
    }

    float getFloorSurface() {
        return this.width * this.length;
    }

    float getPaintingPrice(float costPerSquareMeter) {
        return round(this.getWallsSurface() * costPerSquareMeter);
    }

    float getFloorPrice(float costPerSquareMeter) {
        return round(this.getFloorSurface() * costPerSquareMeter);
    }

    private float round(float value) {
        return ((int) ((value + 0.005f) * 100)) / 100f;
    }

    void displayInformation() {
        System.out.println("Name: " + this.name);
        System.out.println("Length: " + this.length + "m");
        System.out.println("Width: " + this.width + "m");
        System.out.println("Height: " + this.height + "m");
        System.out.println("Volumes: " + this.getVolume() + "m3");
        System.out.println("Walls surface: " + this.getWallsSurface() + "m2");
        System.out.println("Floor surface: " + this.getFloorSurface() + "m2");
    }

    void writeToFile(PrintWriter writer, float priceForPaint, float priceForFloor) {
        writer.println("Name: " + this.name);
        writer.println("Length: " + this.length + "m");
        writer.println("Width: " + this.width + "m");
        writer.println("Height: " + this.height + "m");
        writer.println("Volumes: " + this.getVolume() + "m3");
        writer.println("Walls surface: " + this.getWallsSurface() + "m2");
        writer.println("Floor surface: " + this.getFloorSurface() + "m2");
        writer.println("Painting price: " + this.getPaintingPrice(priceForPaint) + "PLN");
        writer.println("Floor price: " + this.getFloorPrice(priceForFloor) + "PLN");
        writer.close();
        System.out.println("Added to file");
    }
}