public class Crystal{

    private int age;
    private String occupation;
    private List hobbies;

    public Crystal(int age, String occupation, List hobbies) {
        this.age = age;
        this.occupation = occupation;
        this.hobbies = hobbies;
    }

    public static void main(String[] args) {
        Crystal crystal = new Crystal(27, "後端工程師", 
           new ArrayList<>(
               List.of("做網站", "散步", 
                 "用傻瓜相機拍照", "逛沒看過的東西", "聽音樂")
           )
        );
    }
}