function - Purpose of a constructor in Java? - Stack Overflow
2013年11月13日 · A constructor is used to create an instance of the class Card. And you'll need to call it 52 times to have 52 cards: new Card(1, "hearts"), etc. Now each instance of Player (you also need a …
What are the rules for calling the base class constructor?
1189 Base class constructors are automatically called for you if they have no argument. If you want to call a superclass constructor with an argument, you must use the subclass's constructor initialization …
What's the difference between an object initializer and a constructor?
2009年4月11日 · A constructor is a defined method on a type which takes a specified number of parameters and is used to create and initialize an object. An object initializer is code that runs on an …
C++, What does the colon after a constructor mean?
2010年5月7日 · An initializer list is how you pass arguments to your member variables' constructors and for passing arguments to the parent class's constructor. If you use = to assign in the constructor …
When is it right for a constructor to throw an exception?
The constructor's job is to bring the object into a usable state. There are basically two schools of thought on this. One group favors two-stage construction. The constructor merely brings the object into a …
Can I call a constructor from another constructor (do constructor ...
2008年11月21日 · When calling a constructor it actually allocates memory, either from the stack or from the heap. So calling a constructor in another constructor creates a local copy.
How can I invoke asynchronous code within a constructor?
2017年4月16日 · At the moment, I'm attempting to use async/await within a class constructor function. This is so that I can get a custom e-mail tag for an Electron project I'm working on. …
Constructor of an abstract class in C# - Stack Overflow
2015年3月15日 · An abstract class constructor c# code example will be explained. But, the next question can also be arises, as if we cannot instantiate (construct an object using new) an abstract …
C# : assign data to properties via constructor vs. instantiating
2013年10月2日 · Would you really want to have a constructor that has 20 different properties - especially when you only want to actually define one or two? Secondly, default values don't really …
java - Why call super () in a constructor? - Stack Overflow
2012年5月9日 · 0 as constructor is not a part of class, so while calling it cannot be implemented, by using SUPER () we can call the members and memberfunctions in constructor.