静态工厂模式

参考：https://www.cnblogs.com/xuxinstyle/p/9128865.html

// 首先创建一个抽象类

public abstract class INoodles {
    /**
     * 描述每种面条啥样的
     */
    public abstract void desc();
}

// 该抽象类的3个实现子类

public class LzNoodles extends INoodles {
    @Override
    public void desc() {
        System.out.println("兰州拉面");
    }
}
public class PaoNoodles extends INoodles {
    @Override
    public void desc() {
        System.out.println("泡面");
    }
}
public class GankouNoodles extends INoodles {
    @Override
    public void desc() {
        System.out.println("干扣面");
    }
}

// 工厂类

public class SimpleNoodlesFactory {
    public static final int TYPE_LZ = 1; //兰州拉面
    public static final int TYPE_PM = 2; //泡面
    public static final int TYPE_GK = 3; //干扣面
    //根据类型创建不同的对象实例
    public static INoodles createNoodles(int type) {
        switch (type) {
            case TYPE_LZ:
                return new LzNoodles();
            case TYPE_PM:
                return new PaoNoodles();
            case TYPE_GK:
                return new GankouNoodles();
            default:
                return new PaoNoodles(); //默认给一碗泡面
        }
    }
}