定义一个Dog类，包含了age,weight等属性，以及对这些属性操作的方法（如setAge, setWeight, getAge, getWeight）。实现并测试这个类。

类 Dog {
private int age;
private int weight;

public Dog(int age, int weight){
this.age = age;
this.weight = weight;
}

public void setAge(int age){
this.age = age;
}

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

public int getAge(){
return this.age;
}

public int getWeight(){
return this.weight;
}
} // 测试类
public class Test {
public static void main(String[] args) {
Dog dog = new Dog(5, 30);
System.out.println("年龄：" + dog.getAge());
System.out.println("体重：" + dog.getWeight());
dog.setAge(6);
dog.setWeight(35);
System.out.println("年龄：" + dog.getAge());
System.out.println("体重：" + dog.getWeight());
}
} 结果：
年龄：5
体重：30
年龄：6
体重：35