Birds.java

package lesson3;

import java.util.Arrays;

public class Birds {
	
	static String[][] birds = new String[2][4];

	public static void main(String[] args) {
		
		initShop();
		
		System.out.println(Arrays.toString(birds[0]));
		System.out.println(Arrays.toString(birds[1]));
		
		System.out.println("Quantity Of Duck: " + getQuantityOfBirds("duck"));
		System.out.println("Quantity Of Sold Birds: " + getQuantityOfSoldBirds());
		System.out.println("Less Than 3: " + isBirdsLessThan3());
		
		soldBirds("eagle", 2);
		System.out.println("After sales of 2 eagles: " + Arrays.toString(birds[1]));
		
		changePrice("duck", 40);
		System.out.println("After the price change (duck): " + Arrays.toString(birds[0]));
		System.out.println("Profit: " + getProfit());
		System.out.println("Birds In Stock: " + getBirdsInStock());
	}
	
	static void initShop() {
		
		addBirds("duck", 1, 2, 3);
		addBirds("eagle", 4, 8, 7);
	}
	
	static int getQuantityOfSoldBirds() {
		
		int result = 0;
		for (int i = 0; i < birds.length; i++) {
			if (birds[i][2] != null) {
				result = result + Integer.parseInt(birds[i][2]);
			}
		}
		return result;
	}

	static int getQuantityOfBirds(String type) {
		
		int result = 0;
		for (int i = 0; i < birds.length; i++) {
			if (birds[i][0] != null && birds[i][0].equals(type)) {
				result = Integer.parseInt(birds[i][1]);
			}
		}
		return result;
	}
	
	static String isBirdsLessThan3() {
		
		String result = "";
		for (int i = 0; i < birds.length; i++) {
			if (birds[i][1] != null && Integer.parseInt(birds[i][1]) < 3) {
				result = birds[i][0];
			}
		}
		return result;
	}
	
	static void addBirds(String nameOfBirds, int numberOfType, int numberSoldBirds, int priceOfBirds) {
		
		for (int i = 0; i < birds.length; i++) {
			
			if (birds[i][0] == null) {
					birds[i][0] = nameOfBirds;
					birds[i][1] = String.valueOf(numberOfType);
					birds[i][2] = String.valueOf(numberSoldBirds);
					birds[i][3] = String.valueOf(priceOfBirds);
					return;
			}
		}
		increaseShopVolume();
		addBirds(nameOfBirds, numberOfType, numberSoldBirds, priceOfBirds);
	}
	
	static void increaseShopVolume() {
		
		String[][] birds2 = new String[birds.length * 2][4];
		System.arraycopy(birds, 0, birds2, 0, birds.length);
		birds = birds2;
	}
	
	static void soldBirds(String nameOfBirds, int soldBirds) {
		
		for (int i = 0; i < birds.length; i++) {
			
			if (birds[i][0].equals(nameOfBirds) ) {
				birds[i][1] = String.valueOf(Integer.parseInt(birds[i][1]) - soldBirds);
				birds[i][2] = String.valueOf(Integer.parseInt(birds[i][2]) + soldBirds);
			}
		}
	}
	
	static void changePrice(String nameOfBirds, int newPrice) {
		
		for (int i = 0; i < birds.length; i++) {
			
			if (birds[i][0].equals(nameOfBirds) ) {
				birds[i][3] = String.valueOf(newPrice);
			}
		}
	}
	
	static int getProfit() {
		
		int profit = 0;
		for (int i = 0; i < birds.length; i++) {
			
			if (birds[i][0] != null) {
				profit += Integer.parseInt(birds[i][2]) * Integer.parseInt(birds[i][3]);
			}
		}
		return profit;
	}
	
	static int getBirdsInStock() {
		
		int birdsInStock = 0;
		for (int i = 0; i < birds.length; i++) {
			birdsInStock += Integer.parseInt(birds[i][1]);
		}
		return birdsInStock;
	}
}