设计模式-简单工厂

package designPattern;


public class SimpleFactoryPattern {
    public static Father createInstance(String str){
        if("A".equals(str))
            return new SonA();
        else
            return new SonB();
    }

    public static void main(String[] args) {
        Father instance = SimpleFactoryPattern.createInstance("A");
        instance.print();
    }
}

abstract class Father{
    abstract void print();
}
class SonA extends Father{
    @Override
    void print() {
        System.out.println("方法A");
    }
}

class SonB extends Father{
    @Override
    void print() {
        System.out.println("方法B");
    }
}