Hexo

子类可以调用本类的有参构造父类的构造方法不能调用要用super();set和get方法不属于构造方法,可以调用

public class User { private String username; private String password; private String id; private String phoneNumber; public User() { } public User(String username, String password, String id, String phoneNumber) { this.username = username; this.password = password; this.id = id; this.phoneNumber = phoneNumber; } public String getUsername() { return username; } public void setUsername(String username) { this.username =...

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