利用简单工厂设计模式参考以下给定的代码设计一个测试程序。 interface Fruit 定义一个水果的接口 public void eat ; 吃水果的方法 class Apple implements Fruit 定义子类 —— Apple public void eat ……………… class Orange implements Fruit 定义子类 —— Orange pub

public class Test { public static void main(String[] args) { Fruit apple = Factory.getInstance("apple"); apple.eat(); // 输出：吃苹果

    Fruit orange = Factory.getInstance("orange");
    orange.eat(); // 输出：吃橘子
}

}

interface Fruit { void eat(); }

class Apple implements Fruit { @Override public void eat() { System.out.println("吃苹果"); } }

class Orange implements Fruit { @Override public void eat() { System.out.println("吃橘子"); } }

class Factory { public static Fruit getInstance(String className) { Fruit f = null; if ("apple".equals(className)) { f = new Apple(); } if ("orange".equals(className)) { f = new Orange(); } return f; } }