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In Java, a "default constructor" refer to a nullary constructor that is automatically generated by the compiler if no constructors have been defined for the class or in the absence of any programmer-defined constructors (e.g. in Java, the default constructor implicitly calls the superclass's nullary constructor, then executes an empty body ...
In computer programming languages, the term default constructor can refer to a constructor that is automatically generated by the compiler in the absence of any programmer-defined constructors (e.g. in Java), and is usually a nullary constructor. In other languages (e.g. in C++) it is a constructor that can be called without having to provide ...
In computer programming, a nullary constructor is a constructor that takes no arguments. [1] Also known as a 0-argument constructor , no-argument constructor , [ 2 ] parameterless constructor or default constructor .
In Java, methods are virtual by default, but can be made non-virtual by using the final keyword (i.e., opt-out virtual). C++ enumerations are primitive types and support implicit conversion to integer types (but not from integer types). Java enumerations can be public static enum {enumName1, enumName2} and are used like classes.
Note that instance variables defined in superclasses are already initialized by this point, because they were initialized by a superclass constructor when it was called (either by the constructor's code or by variable initializers performed before the constructor's code or implicitly to default values). In Java, variable initializers are ...
clone() acts like a copy constructor. Typically it calls the clone() method of its superclass to obtain the copy, etc. until it eventually reaches Object 's clone() method. The special clone() method in the base class Object provides a standard mechanism for duplicating objects.
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The MazeGame constructor is a template method that adds some common logic. It refers to the makeRoom() factory method that encapsulates the creation of rooms such that other rooms can be used in a subclass. To implement the other game mode that has magic rooms, the makeRoom method may be overridden: