小米(Mi)、海尔(Haier) 、TCL、都是数码家电制造商，它们都生产电视机 (Television)、空调(AirConditioner)、手机 (MobilePhone)。请用java设计一个系统，使用桥接模式，描述这家电制造商以及它们制造的电器。

我们可以先定义一个抽象类Electronics，包含生产商名称(brandName)和产品名称(productName)属性，以及一个抽象方法showInfo()用于展示电器的信息。

public abstract class Electronics {
    protected String brandName;
    protected String productName;
    
    public Electronics(String brandName, String productName) {
        this.brandName = brandName;
        this.productName = productName;
    }
    
    public abstract void showInfo();
}

然后我们可以定义具体的电器类，继承自Electronics类，如下：

public class Television extends Electronics {
    public Television(String brandName, String productName) {
        super(brandName, productName);
    }
    
    @Override
    public void showInfo() {
        System.out.println("This is a " + brandName + " " + productName + " television.");
    }
}

public class AirConditioner extends Electronics {
    public AirConditioner(String brandName, String productName) {
        super(brandName, productName);
    }
    
    @Override
    public void showInfo() {
        System.out.println("This is a " + brandName + " " + productName + " air conditioner.");
    }
}

public class MobilePhone extends Electronics {
    public MobilePhone(String brandName, String productName) {
        super(brandName, productName);
    }
    
    @Override
    public void showInfo() {
        System.out.println("This is a " + brandName + " " + productName + " mobile phone.");
    }
}

接下来我们可以定义一个桥接类Brand，包含一个Electronics类型的属性，以及一个showBrand()方法用于展示该品牌的所有电器信息。

public class Brand {
    protected Electronics electronics;
    
    public Brand(Electronics electronics) {
        this.electronics = electronics;
    }
    
    public void showBrand() {
        electronics.showInfo();
    }
}

最后，我们可以使用这些类组合出具体的电器品牌和产品：

public class Main {
    public static void main(String[] args) {
        Electronics xiaomiTelevision = new Television("Xiaomi", "Mi TV 4S");
        Electronics haierAirConditioner = new AirConditioner("Haier", "HSU-12LTC13/B1");
        Electronics tclMobilePhone = new MobilePhone("TCL", "10 Pro");
        
        Brand xiaomi = new Brand(xiaomiTelevision);
        Brand haier = new Brand(haierAirConditioner);
        Brand tcl = new Brand(tclMobilePhone);
        
        xiaomi.showBrand();
        haier.showBrand();
        tcl.showBrand();
    }
}

输出结果：

This is a Xiaomi Mi TV 4S television.
This is a Haier HSU-12LTC13/B1 air conditioner.
This is a TCL 10 Pro mobile phone.