2023.7.21 周五：面向对象

 1 //类
 2 public class Student {
 3     String name;
 4     int age;
 5     //使用new关键字，必然会调用构造器
 6     public Student(){}//默认构造
 7     //有参构造
 8     public Student(String name)
 9     {
10         this.name = name;
11     }
12     public void say(){
13         System.out.println(this.name+"在说话");//this指针的调用
14     }
15 }
16 //main
17 public class Main {
18     public static void main(String[] args){
19         Student s = new Student();
20         s.name = "不良帅";
21         s.age = 300;
22         System.out.println(s.name);
23         System.out.println(s.age);
24         s.say();
25     }
26 }