20240414

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()); } }