定义猫类Cat继承Animal类。 成员属性：可爱度lovely构造方法：无参、全参；成员方法：抓老鼠 重写吃饭…

public class Cat extends Animal {
    private int lovely;

    public Cat() {
        super();
        this.lovely = 0;
    }

    public Cat(String name, int age, String gender, int lovely) {
        super(name, age, gender);
        this.lovely = lovely;
    }

    public void catchMouse() {
        System.out.println("猫正在抓老鼠！");
    }

    @Override
    public void eat() {
        System.out.println("猫正在吃鱼！");
    }
}