抽象工厂

/**
 * 桌子接口
 */
public interface Desk {
    String getType();
}

/**
 * 木质桌子
 */
public class WoodenDesk implements Desk {
    private String type = "木质桌子";
    @Override
    public String getType() {
        return type;
    }
}

/**
 * 塑料桌子
 */
public class PlasticDesk implements Desk {
    private String type = "塑料桌子";
    @Override
    public String getType() {
        return type;
    }
}

/**
 * 椅子接口
 */
public interface Chair {
    String getType();
}

/**
 * 木质椅子
 */
public class WoodenChair implements Chair {
    private String type = "木质椅子";
    @Override
    public String getType() {
        return type;
    }
}

/**
 * 塑料椅子
 */
public class PlasticChair implements Chair {
    private String type = "塑料椅子";
    @Override
    public String getType() {
        return type;
    }
}

/**
 * 家具工厂
 */
public interface FurnitureFactory {
    Desk createDesk();
    Chair createChair();
}

/**
 * 木质家具工厂
 */
public class WoodenFurnitureFactory implements FurnitureFactory {
    @Override
    public Desk createDesk() {
        return new WoodenDesk();
    }
    @Override
    public Chair createChair() {
        return new WoodenChair();
    }
}

/**
 * 塑料家具工厂
 */
public class PlasticFurnitureFactory implements FurnitureFactory {
    @Override
    public Desk createDesk() {
        return new PlasticDesk();
    }
    @Override
    public Chair createChair() {
        return new PlasticChair();
    }
}

/**
 * 测试类
 */
public class Clienter {
    public static void main(String[] args) {
        FurnitureFactory factory = new PlasticFurnitureFactory();
        Desk desk = factory.createDesk();
        Chair chair = factory.createChair();
    }
}