I'm stuck to override compare method in Comparator for ascending order sorting.
I want to sort in ascending order of roll number
Code:
class Sortbyroll implements Comparator<Student>
{
public int compare(Student a, Student b)
{
if (a.rollno > b.rollno ){
return 1;
}
if (a.rollno < b.rollno){
return -1;
}
if (a.rollno == b.rollno){
return 0;
}
}
what to do if I want to sort in ascending order ?