Extend a java class from one file in another java file

Question

How can I include one java file into another java file?

For example: If I have 2 java file one is called Person.java and one is called Student.ja

Answer 1

You don't.

If you want to extend Person with Student, just do:

public class Student extends Person
{
}

And make sure, when you compile both classes, one can find the other one.

What IDE are you using?