How to create instance of a class with the parameters in the constructor using reflection? [duplicate]

Answer 1

You need to say which constructor you want to use a pass it arguments.

Car c = Car.class.getConstructor(String.class).newInstance("Lightning McQueen");

Answer 2

If you are handling super / subclasses, or for whatever reason don't know exactly what Class is to be instantiated, the forName() method will be required also:

(ClassName) Class.forName([name_of_the_class])
      .getConstructor([Type]).newInstance([Constructor Argument]);

This assumes name_of_the_class is a passed variable. Also, if the class is in a package, even if that package has been imported, you still have to explicitly stipulate the package in forName() (I think, I'm new to all this).

Class.forName([name_of_package].[name_of_class])