ADD file via upload

Ordered_drinks.java

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+package com.example.drink_order_system;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Ordered_drinks{
+	private Drinks drink;
+	//private Flavor flavor;
+	private int drink_number;
+	private String restaurantName;
+	private static ArrayList<Ordered_drinks> ordered_array = new ArrayList<>();
+	Ordered_drinks(Drinks drink, int drink_number,String restaurantName)
+	{
+		this.drink = drink;
+		//this.flavor = flavor;
+		this.drink_number = drink_number;
+		this.restaurantName = restaurantName;
+		boolean in = false;
+		for(int i = 0; i < ordered_array.size(); i++)
+		{
+			Drinks temp_drink = ordered_array.get(i).get_drink();
+			//Flavor temp_flavor = ordered_array.get(i).get_flavor();
+			if(drink.get_name() == temp_drink.get_name() )
+			{
+				ordered_array.get(i).drink_number += drink_number;
+				in = true;
+				break;
+			}
+		}
+		if(!in)
+		{
+			ordered_array.add(this);
+			for(int i = 0; i < ordered_array.size(); i++) {
+				System.out.println(ordered_array.get(i).get_drink().get_name());
+			}
+		}
+	}
+	
+	public Drinks get_drink()
+	{
+		return drink;
+	}
+	
+	/*public Flavor get_flavor()
+	{
+		return flavor;
+	}*/
+	
+	public int get_drink_number()
+	{
+		return drink_number;
+	}
+
+	public static ArrayList<Ordered_drinks> getOrdered_array()
+	{
+		return ordered_array;
+	}
+
+	public String get_restaurant_name(){return restaurantName;}
+	public static int getDrinkCost()
+	{
+		int sum = 0;
+		for (Ordered_drinks od:ordered_array)
+		{
+			/*if(od.get_flavor().getSize().equals("中杯"))
+			{*/
+				sum += od.get_drink().get_price()*od.get_drink_number();
+			/*} else if (od.get_flavor().getSize().equals("小杯")) {
+				sum += (od.get_drink().get_price()-2)*od.get_drink_number();
+			}
+			else
+			{
+				sum += (od.get_drink().get_price()+2)*od.get_drink_number();
+			}*/
+		}
+		return sum;
+	}
+
+	public static void clearOrdered_array()
+	{
+		ordered_array.clear();
+	}
+
+	public static void addDrink(int i)
+	{
+		ordered_array.get(i).drink_number++;
+		for(int j = 0; j < ordered_array.size(); j++) {
+			System.out.println(ordered_array.get(j).get_drink().get_name());
+		}
+	}
+
+	public static void subtractDrink(int i)
+	{
+		if(ordered_array.get(i).drink_number<=1)
+		{
+			ordered_array.remove(i);
+			for(int j = 0; j < ordered_array.size(); j++) {
+				System.out.println(ordered_array.get(j).get_drink().get_name());
+			}
+		}
+		else {
+			ordered_array.get(i).drink_number--;
+		}
+	}
+
+
+}