简单工厂模式

public interface product {
    public void phone();
}

public class productA implements product {
@Override
public void phone() {
    System.out.println("我可以生产A手机");
}
}

public class productB implements product {
    @Override
    public void phone() {
        System.out.println("我可以生产B手机");
    }
}

public class factor {
public void creat(String n) {
    if (n.equals("A")) {
        productA productA= new productA();
        productA.phone();
    }else if (n.equals("B")) {
        productB productB= new productB();
        productB.phone();
    }else {
        System.out.println("生产不出来");
    }
}
}

public class client {
public static void main(String[] args) {
    factor factor=new factor();
    factor.creat("A");
}
}