2023.7.21 周五：面向对象

//类
public class Student {
    String name;
    int age;
    //使用new关键字，必然会调用构造器
    public Student(){}//默认构造
    //有参构造
    public Student(String name)
    {
        this.name = name;
    }
    public void say(){
        System.out.println(this.name+"在说话");//this指针的调用
    }
}
//main
public class Main {
    public static void main(String[] args){
        Student s = new Student();
        s.name = "不良帅";
        s.age = 300;
        System.out.println(s.name);
        System.out.println(s.age);
        s.say();
    }
}