package designmode;
interface Fruit {
public void eat();
}
class Apple implements Fruit {
public void eat() {
System.out.println("这个苹果真好吃！");
}
}
class Banana implements Fruit {
public void eat() {
System.out.println("开始吃香蕉！");
}
}
class Factory { // 工厂设计模式
public static Fruit getInstance(String str) {// 一般写static表示不需要写属性
if (str.equals("apple")) {
return new Apple();
} else if (str.equals("banana")) {
return new Banana();
} else {
return null;
}
}
}
public class FactoryDemo {
public static void main(String[] args) {
Fruit f = Factory.getInstance("apple");
Fruit f1 = Factory.getInstance("banana");
f.eat();// 这个苹果真好吃！
f1.eat();// 开始吃香蕉！
}
}
