定义一个动物类Animal为抽象类：成员变量weight、age、成员函数getAge、getWeight、setAgeint、setWeightint、叫声meow。根据Animal类派生出猫Cat类猫所具有的成员变量weight、age、color成员函数getAge、getWeight、setAgeint、setWeightint、setColorchar、getColor、run、meow

abstract class Animal {
    protected int weight;
    protected int age;
    public Animal(int weight, int age) {
        this.weight = weight;
        this.age = age;
    }
    public int getAge() {
        return age;
    }
    public int getWeight() {
        return weight;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public void setWeight(int weight) {
        this.weight = weight;
    }
    public abstract void meow();
}

class Cat extends Animal {
    private String color;
    public Cat(int weight, int age, String color) {
        super(weight, age);
        this.color = color;
    }
    public String getColor() {
        return color;
    }
    public void setColor(String color) {
        this.color = color;
    }
    public void run() {
        System.out.println("I am running.");
    }
    @Override
    public void meow() {
        System.out.println("Meow~");
    }
}

public class Main {
    public static void main(String[] args) {
        Cat cat = new Cat(5, 2, "black");
        System.out.println("Age: " + cat.getAge());
        System.out.println("Color: " + cat.getColor());
        cat.meow();
    }
}
``