使用Java语言代码面向对象实现饮品店 思路:1.定义饮品类(Drink)； 2.定义可乐类(Cola)，继承饮品类(Drink)； 3.定义咖啡类(Coffee),继承饮品类(Drink)； 4.定义奶茶类(Milk),继承饮品类(Drink)； 5.定义测试类，编写主界面，用Scanner输入数据，用switch嵌套进行选择判断

好的，下面是Java语言代码的实现：

1. 饮品类(Drink)

public abstract class Drink {
    private String name; // 饮品名称
    private double price; // 饮品价格
    private int size; // 饮品大小

    public Drink(String name, double price, int size) {
        this.name = name;
        this.price = price;
        this.size = size;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }

    public int getSize() {
        return size;
    }

    public abstract void taste(); // 抽象方法，表示饮品的口感
}

2. 可乐类(Cola)，继承饮品类(Drink)

public class Cola extends Drink {
    public Cola(String name, double price, int size) {
        super(name, price, size);
    }

    @Override
    public void taste() {
        System.out.println("可乐口感：甜中带有一点儿苦涩");
    }
}

3. 咖啡类(Coffee)，继承饮品类(Drink)

public class Coffee extends Drink {
    public Coffee(String name, double price, int size) {
        super(name, price, size);
    }

    @Override
    public void taste() {
        System.out.println("咖啡口感：苦中带有一点儿甜味");
    }
}

4. 奶茶类(Milk)，继承饮品类(Drink)

public class Milk extends Drink {
    public Milk(String name, double price, int size) {
        super(name, price, size);
    }

    @Override
    public void taste() {
        System.out.println("奶茶口感：甜中带有一点儿清香");
    }
}

5. 测试类

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("欢迎来到饮品店，以下是本店的菜单：");
            System.out.println("1. 可乐");
            System.out.println("2. 咖啡");
            System.out.println("3. 奶茶");
            System.out.println("4. 退出");

            System.out.print("请输入您要选择的饮品编号：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    Cola cola = new Cola("可乐", 3.0, 500);
                    System.out.println("您选择的是：" + cola.getName() + "，价格为：" + cola.getPrice() + "元，大小为：" + cola.getSize() + "毫升。");
                    cola.taste();
                    break;
                case 2:
                    Coffee coffee = new Coffee("咖啡", 5.0, 300);
                    System.out.println("您选择的是：" + coffee.getName() + "，价格为：" + coffee.getPrice() + "元，大小为：" + coffee.getSize() + "毫升。");
                    coffee.taste();
                    break;
                case 3:
                    Milk milk = new Milk("奶茶", 6.0, 400);
                    System.out.println("您选择的是：" + milk.getName() + "，价格为：" + milk.getPrice() + "元，大小为：" + milk.getSize() + "毫升。");
                    milk.taste();
                    break;
                case 4:
                    System.out.println("感谢您的光临，下次再见！");
                    scanner.close();
                    System.exit(0);
                default:
                    System.out.println("请输入正确的选项编号！");
                    break;
            }
        }
    }
}