Problem related to Timtable

I have done with ProfessorAssaigner.java to assaign a professor for a subject based on priorities..

But i can't understand how get competing professors for that subject..

My method for that..

private ArrayList getCompetingProf(Subject s)

{

ArrayList competingProfs = new ArrayList();

// code to select competingProfs

return competingProfs;

}

Please anyone help

Thanks in advance...