Can constructor be overloading?
Yes! Java supports constructor overloading. In constructor loading, we create multiple constructors with the same name but with different parameters types or with different no of parameters.
There can be only one special method with the name ” constructor ” in a class. Having more than one occurrence of a constructor method in a class will throw a SyntaxError error.
Can constructors Cannot be overloaded?
A default constructor cannot be overloaded in the same class. This is because once a constructor is defined in a class, the compiler will not create the default constructor. Thus, an attempt to overload the default constructor will effectively remove it from the class. The constructor must not use a different name.
Can constructor be overloaded Java?
The technique of having two (or more) constructors in a class is known as constructor overloading. A class can have multiple constructors that differ in the number and/or type of their parameters. It’s not, however, possible to have two constructors with the exact same parameters.
How we can overload a constructor in Java?
In addition to overloading methods, we can also overload constructors in java. Overloaded constructor is called based upon the parameters specified when new is executed. When do we need Constructor Overloading? Sometimes there is a need of initializing an object in different ways.
Can constructor be private?
Yes. Class can have private constructor. Even abstract class can have private constructor. By making constructor private, we prevent the class from being instantiated as well as subclassing of that class.
Can constructors be static?
One of the important property of java constructor is that it can not be static. We know static keyword belongs to a class rather than the object of a class. A constructor is called when an object of a class is created, so no use of the static constructor.
Why constructors are not inherited?
A subclass inherits all the members like (fields, methods, and nested classes) from its superclass. Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.
Can methods be overloaded in Java?
In Java, two or more methods may have the same name if they differ in parameters (different number of parameters, different types of parameters, or both). These methods are called overloaded methods and this feature is called method overloading.
Can constructor be inherited?
Constructors are not members, so they are not inherited by subclasses, but the constructor of the superclass can be invoked from the subclass.
Can constructor be synchronized in Java?
Note that constructors cannot be synchronized — using the synchronized keyword with a constructor is a syntax error. Synchronizing constructors doesn’t make sense, because only the thread that creates an object should have access to it while it is being constructed.
How many subclasses can a superclass have?
There is no limitation to how many subclasses a superclass can have. Likewise, there isn’t a limitation on the number of levels of inheritance. A hierarchy of classes can be built upon a certain area of commonality. In Java, when a subclass inherits from a superclass, it’s known as “extending” the superclass.