I was looking through my OOP class documentation and I found this example:
class Student {
private String name;
public int averageGrade;
public Student(String n, int avg) {
name = n;
averageGrade = avg;
}
public static void main(String[] args) {
Student s = new Student("John", 9);
}
}
I find it confusing that they are instantiating an object from the main of the same class. Is this considered bad practice? Will the newly created object s
have a main method?
Thank you!
There's nothing wrong at all with this. It's entirely normal. (Admittedly it would make more sense for a class with a main method to be something one could obviously execute - a main
method in a Student
class doesn't make as much sense.)
Objects don't really have methods - classes have methods, either static methods which are called without any particular context, and instance methods which are called on a particular object of that type (or a subclass).
While you could call s.main(...)
that would actually just resolve to a call to the static method Student.main
; you shouldn't call static methods "via" expressions like this, as it's confusing.