用java的方式创建父类:动物。拥有姓名、月份、物种三个属性;有吃东西、输出年龄的方法。" 创建子类狗 继承父类 有体重和屋巴两个属性:有定义屋巴形状、输出物种、获取体重的方法。" 创建子类企鹅，继承父类，有体重这个属性;有跑、输出物种、获取体重的方法。"创建测试类，定义企鹅、输出方法;定义狗，输出方法。

下面是Java代码实现：

//动物类
public class Animal {
    private String name;
    private int month;
    private String species;

    public Animal(String name, int month, String species) {
        this.name = name;
        this.month = month;
        this.species = species;
    }

    public void eat() {
        System.out.println(name + " is eating.");
    }

    public void getAge() {
        System.out.println(name + " is " + month + " months old.");
    }

    public String getSpecies() {
        return species;
    }
}

//狗类
public class Dog extends Animal {
    private double weight;
    private String bark;

    public Dog(String name, int month, String species, double weight, String bark) {
        super(name, month, species);
        this.weight = weight;
        this.bark = bark;
    }

    public void setBark(String bark) {
        this.bark = bark;
    }

    public void getWeight() {
        System.out.println(getSpecies() + " " + getName() + "'s weight is " + weight + "kg.");
    }

    public void setWeight(double weight) {
        this.weight = weight;
    }

    public void setShape(String shape) {
        System.out.println(getSpecies() + " " + getName() + "'s house shape is " + shape);
    }
}

//企鹅类
public class Penguin extends Animal {
    private double weight;

    public Penguin(String name, int month, String species, double weight) {
        super(name, month, species);
        this.weight = weight;
    }

    public void run() {
        System.out.println(getName() + " is running.");
    }

    public void getWeight() {
        System.out.println(getSpecies() + " " + getName() + "'s weight is " + weight + "kg.");
    }

    public void setWeight(double weight) {
        this.weight = weight;
    }
}

//测试类
public class Test {
    public static void main(String[] args) {
        Dog dog = new Dog("Tom", 12, "Golden Retriever", 25.6, "Wang Wang");
        dog.eat();
        dog.getAge();
        dog.getWeight();
        dog.setShape("Round");

        Penguin penguin = new Penguin("Jerry", 6, "Emperor Penguin", 10.3);
        penguin.eat();
        penguin.getAge();
        penguin.getWeight();
        penguin.run();
    }
}