publicstaticvoidmain(String[] args){ //调用的User类的无参构造方法 User user = new User(); user.age = 47; user.name = "Pony"; System.out.println("年龄:"+user.age+",名字:"+user.name); //调用的User类的无参构造方法 User user2 = new User(54,"Jack"); System.out.println("年龄:"+user2.age+",名字:"+user2.name); } }