java工厂模式demo

package object;

/**
 * @author dayu
 * @date 2019/03/05
 * @Describe 通过反射类改进工厂的设计模式可以最大的改进子类的操作，通过new造成耦合问题 ...工厂类使用泛型可以变成高可用的状态
 */
public class FactoryDemo {
    public static void main(String[] args) {
        // IFruit fruit = new Orange();

        IFruit fruit = Factory.getInstance("object.Banana");
        fruit.eat();

        IMessage msg = Factory.getInstance("object.Msgs");
        msg.print();
    }
}

interface IFruit {
    void eat();
}

interface IMessage {
    void print();
}

class Msgs implements IMessage {
    @Override
    public void print() {
        System.out.println("Msgs.print()");
    }

}

class Orange implements IFruit {
    @Override
    public void eat() {
        System.out.println(this.getClass().getName() + " 吃橘子");
    }
}

class Apple implements IFruit {
    @Override
    public void eat() {
        System.out.println(this.getClass().getName() + " 吃苹果");
    }
}

class Banana implements IFruit {
    @Override
    public void eat() {
        System.out.println(this.getClass().getName() + " 吃香蕉");
    }
}

/**
 * 工厂类使用泛型可以变成高可用的状态
 */
class Factory {
    private Factory() {}

    @SuppressWarnings("unchecked")
    public static <T> T getInstance(String className) {
        T obj = null;
        try {
            obj = (T)Class.forName(className).newInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return obj;
    }

}