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Sep 22, 2010 · The super keyword in Java is a reference variable that is used to refer to the immediate parent class object. Usage of Java super Keyword. super can be used to refer to the immediate parent class instance variable. super can be used to invoke the immediate parent class method. super() can be used to invoke immediate parent class constructor.
Nov 4, 2010 · You may also use the super keyword in the sub class when you want to invoke a method from the parent class when you have overridden it in the subclass. Example:
Oct 26, 2010 · this keyword use to call constructor in the same class (other overloaded constructor) syntax: this (args list); //compatible with args list in other constructor in the same class . super keyword use to call constructor in the super class. syntax: super (args list); //compatible with args list in the constructor of the super class. Ex:
Even if String fits in Object (which is a super class of Number) you woudln't be sure to be able to add a Number to a List that contain any subclass from one of the super classes of Number) super doesn't mean any subclass of one of the super classes, it only means one of the super classes.
Aug 31, 2016 · super is an key word not an reference or object for super/parent class, it will call method or constructor of super/parent class. – KhAn SaAb Commented Aug 31, 2016 at 11:10
Feb 25, 2009 · You just cannot cherry pick from the super class. However, there may happen situations when you feel the need to call super.super.method() - usually a bad design sign, in your code or in the code you inherit ! If the super and super super classes cannot be refactored (some legacy code), then opt for composition over inheritance.
Apr 13, 2010 · Invoking Java keyword super. 2. Why should I call super() in Java? 1 'Super' keyword in Java. 0.
Simply to say as name implies "super" points to the super class i.e. immediate parent class. It is meant to obtain immediate instance of super class either it may be method or variables. As i pointed super can be used to retrieve instance of immediate parent class in case of multilevel inheritance it will not work if you are trying to get instance of extreme parent class.
Nov 14, 2013 · Java 8 interfaces introduce some aspects of multiple inheritance. Default methods have an implemented function body. To call a method from the super class you can use the keyword super , but if you want to make this with a super interface it's required to name it explicitly.
Jun 28, 2015 · The special forms using the keyword super are valid only in an instance method, instance initializer or constructor, or in the initializer of an instance variable of a class; these are exactly the same situations in which the keyword this may be used (§15.8.3).
