44 面向对象编程

 1 class Dem1_Student{
 2     public static void main(String[] args) {
 3         Student s = new Student();
 4         s.name = "张三";
 5         s.age = 23;
 6         System.out.println(s.name+s.age);
 7         s.sleep();
 8     }
 9 }// 测试类
10 
11 class Student{
12 
13     String name;
14     int age;
15     String gender;
16 
17     public void study(){
18         System.out.println("study....s");
19     }
20 
21     public void sleep(){
22         System.out.println("sleep....");
23     }
24 
25 
26 
27 }   //基本类