// 抽象产品
interface Block {
  public void print();
}
// 具体产品
class IBlock implements Block {
  @Override
  public void print() {
    System.out.println("我是一个I形的方块！");
  }
}
// 具体产品
class LBlock implements Block {
  @Override
  public void print() {
    System.out.println("我是一个L形的方块！");
  }
}
// 抽象工厂
interface Factory {
  public Block getInstance();
}
// 具体工厂
class IBlockFactory implements Factory {
  @Override
  public Block getInstance() {
    return new IBlock();
  }
}
// 具体工厂
class LBlockFactory implements Factory {
  @Override
  public Block getInstance() {
    return new LBlock();
  }
}
// 客户端
public class TestAdvancedFactory {
  public static void main( String[] args ) {
    // 创建一个生产 I 形方块的工厂
    Factory iBlockFactory = new IBlockFactory();
    // 用工厂生产一个 I 形方块
    Block iBlock = iBlockFactory.getInstance();
    iBlock.print();
    // 创建一个生产 L 形方块的工厂
    Factory LBlockFactory = new LBlockFactory();
    // 用工厂生产一个 L 形方块
    Block lBlock = LBlockFactory.getInstance();
    lBlock.print();
  }
}