原文:Implicit super constructor xx() is undefined for default constructor. Must define an explicit constructor

錯誤:Implicit super constructor xx is undefined for default constructor. Must define an explicit constructor 因為你的父類已經定義了一個有參的構造器,此時編譯器不會為你調用默認的構造器,當子類繼承時,必須在自己的構造函數顯示調用父類的構造器,自己才能確保子類在初始化前父類會被實例化,如果你父類 ...

2013-10-02 23:09 0 4190 推薦指數:

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Constructor call must be the first statement in a constructor

super()和this ()不能共存。否則編譯時會報異常。 Constructorcall must be the first statement in a constructor 換句話說就是super()和this()都必須在構造方法的第一行。 this(有參數 ...

Thu Jun 01 05:39:00 CST 2017 0 3086
No default constructor for entity

異常: org.springframework.orm.hibernate3.HibernateSystemException: No default constructor for entity Caused by: org.hibernate.InstantiationException ...

Tue Jun 30 19:39:00 CST 2020 0 610
 
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