Can we overload the constructor?

Answer 1

Yes you can in java and C++, overloading the constructors is done by changing the number of parameters.

Answer 2

You can overload constructors and methods in c++ by changing parameters and return type in c++
Constructor dont have any return type but it is for methods(member function)
But in java the return type of methods must be same

Answer 3

In C++ you can also overload the new operator.