![]() Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I doubt you can use constructor chaining with reflection since to invoke superclass constructor compiler is forcing us to use. This means reading public fields of the derived class will result in undefined, while reading private fields will result in a TypeError. to access the parent's properties and methods. The code in the constructor for Rectangle is run. I was just trying to extend someone else's class from a different package. Why did my papers get repeatedly put on the last day and the last session of a conference? If you don't want to call the superclass constructor, you aren't calling A's constructor from B here anyway, B doesn't inherit from A. ![]() As pointed out by another poster, B doesn't extend A, so it won't call A's constructor anyways. CGLIB-based proxy classes no longer require a default constructor. Is a house without a service ground wire to the panel safe? The most common use of the super keyword is to eliminate the confusion between superclasses and subclasses that have methods with the same name. In effect, the ancestor that's furthest up has Now you will create an application to test your derived class. Constructors are generally used for instantiating an object. The possibility is that you can call the super class constructor of your choice. there are a couple of libraries available that make it easy to instrument the byte code. Anyways - i believe if you still want to do it and then you would have to manipulate the generated byte code. super is used to call a superclass constructor: When a subclass is created, its constructor must call the constructor of its parent class. If you don't provide your own constructor, then a default constructor will be supplied for you. What you could possibly do is place the two (or however many) class files into their own package and then use the protected access modifier so that the constructor is only usable within the package. Thanks for contributing an answer to Stack Overflow! Is it possible to open and close ROSAs several times? This trick is called "return overriding", which allows a derived class's fields (including private ones) to be defined on unrelated objects.
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