public class Student { private int studentId; // the student's identification number private String name; // the student's name private double gpa; // the student's grade point average
/***************************************************************************
* Student
* The constructor for the student class
***************************************************************************/
public Student(int id, String theName, double theGPA)
{
studentId = id;
name = theName;
gpa = theGPA;
} // constructor
/***************************************************************************
* toString
* Convert the data in a student object into a String.
***************************************************************************/
public String toString()
{
return String.format("%7d %-20s %4.2f", studentId, name, gpa);
}
/***************************************************************************
* compareTo
* Compare the student id of this object to that of the given object.
* parameters:
* student - the given student object
* returns:
* -1 if this student id is the smaller of the two id's
* 0 if the student id's are equal
* 1 if this student id is the larger of the two id's
***************************************************************************/
public int compareTo(Student student)
{
if(student.studentId<studentId)
{
return -1;
}
else if(student.studentId>studentId)
{
return 1;
}
else
{
return 0;
}
} // compareTo
} // class Student
in the main class this is the method im trying to use:
public static void orderedInsert(ArrayList<Student>students, Student student)
{
int size = students.size();
int current = size -1;
for(int i=1; i<students.size(); i++) {
while (current >= 0 && students.get(current).compareTo(students.get(i)) > 0) {
current--;
students.add(current + 1, student);
}
}
} // orderedInsert
