创建抽象类GeneralRobot在该类中定义三个属性和三个抽象方法，创建IndustrialRobot和 ServiceRobot继承GeneralRobot并重写父类中的三个抽象方法。

创建抽象类`GeneralRobot`是为了定义一组通用的行为特征和属性，而不需要具体的实现。在这个例子中，我们可能会这样设计：

// GeneralRobot抽象类
public abstract class GeneralRobot {
    // 定义三个属性
    protected String name;
    protected int age;
    protected String type;

    // 定义三个抽象方法，表示通用的行为
    public abstract void operate();
    public abstract void recharge();
    public abstract void selfDiagnose();

    // 具体实现留给子类
    public void initialize() {
        System.out.println(this.name + " is initializing.");
    }
}

然后，我们可以创建两个子类`IndustrialRobot`和`ServiceRobot`，它们继承自`GeneralRobot`并重写抽象方法：

// IndustrialRobot子类
public class IndustrialRobot extends GeneralRobot {
    @Override
    public void operate() {
        System.out.println(name + " is operating an industrial process.");
    }

    @Override
    public void recharge() {
        System.out.println(name + " is recharging its industrial batteries.");
    }

    @Override
    public void selfDiagnose() {
        System.out.println(name + " is performing a self-diagnostic for industrial checks.");
    }
}

// ServiceRobot子类
public class ServiceRobot extends GeneralRobot {
    @Override
    public void operate() {
        System.out.println(name + " is providing service to customers.");
    }

    @Override
    public void recharge() {
        System.out.println(name + " is charging its service batteries.");
    }

    @Override
    public void selfDiagnose() {
        System.out.println(name + " is checking its service functions.");
    }
}