Write a student class in Java that implements the Comparable interface. The class has:
- Two instance variables studentId (String) and gpa (double). StudentId would contain six-digit Student Id, and the value of GPA is between 0.00 and 4.00.
- Two constructors with the following headers:
--> public Student(String studentId, double gpa)
--> public Student(double gpa)
- Two accessor methods: public String getStudentId(), and public double getGPA().
- A public String toString() method that displays student information in the following format: "Student Id: " + studentId + " GPA: " +gpa
- A public int compareTo(Object object) that will compare two Student objects based on their student Ids.