import java.util.*;
public class StudentClientSorter
{
	public static void main(String[] args)
	{
		Random generator = new Random();
		
		ArrayList<CollegeStudent> roll = new ArrayList<>();
		for (int k = 1; k <= 13; k++)
			roll.add( randomStudent(generator, false) );
         
		Collections.shuffle(roll);
		display( roll );
      
      Collections.sort(roll);
      display(roll);
		
		Collections.sort(roll, new CreditsComparator());
		display(roll);
		
		Collections.sort(roll, new GpaComparator() );
		display(roll);
/**/
	}
	
	
	public static CollegeStudent randomStudent(Random generator, boolean traceOn)
	{
			double gpa = (generator.nextInt(301) + 100) / 100.0;
			int credits = generator.nextInt(106) + 10;
			CollegeStudent alum = new CollegeStudent(credits, gpa);
			if (traceOn)
				System.out.println( alum );
			return alum;
	}

	public static void display(ArrayList<CollegeStudent> list)
	{
		System.out.println();
		for (CollegeStudent joe : list)
			System.out.println( joe );
	}
}