20240207

创建Javabean对象，设置和获取属性的值，来实践Javabean的应用

public class Main {
    public static void main(String[] args) {
        User user = new User();
        user.setUsername("John");
        user.setAge(25);
        
        System.out.println("用户名：" + user.getUsername());
        System.out.println("年龄：" + user.getAge());
    }
}