Enclosing instance required that contains outerclass.innerclass

Question

Student.Student_Card obj4 = Student.new Student_Card(namess, idss, true);

Student class is an outer class and Studen_Card is nested class,when i am running this code i am getting error that: an enclosing instance that contains Student.Student_Card is required

Hi! ..put the `new ` in front! ..this will fix the issue or at least produce another error (message). — xerx593, Apr 09 '20 at 07:04
`StudentCard`. Why add an `_`? Java class names are already camel case by convention. Also, why use an inner-class? And is there some reason we can't see your code? — Elliott Frisch, Apr 09 '20 at 07:04

score 1 · Answer 1 · answered Apr 09 '20 at 07:03

1

You need to do it like this:

Student.Student_Card obj4 =new Student.Student_Card(namess, idss, true);

answered Apr 09 '20 at 07:03

Manos Kounelakis

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score 0 · Answer 2 · answered Apr 09 '20 at 07:03

If you want to get rid of the error, mark the inner class with static, as so: static class Student_Card

Otherwise, note that inner classes require an instance of the outer class, like so:

Student student = new Student();
Student_Card studentCard = student.new Student_Card()

score 0 · Answer 3 · answered Apr 09 '20 at 07:03

If your Student_Card class is not static, then you need an instance of Student in order to create it.

Student student = new Student();
Student.Student_Card obj4 = student.new Student_Card(namess, idss, true);

If you will make class `Student_Card static, then you don't need any reference to your Student class at all, this will work:

Student.Student_Card card=  new Student.Student_Card(namess, idss, true);

You can read more in this thread.

Enclosing instance required that contains outerclass.innerclass

3 Answers3