import java.util.*; 

class Program {
  public static void main(String[] args) {
    ArrayList<Student> a = new ArrayList<Student>(); 
    a.add(new Student("Larry", 12)); 
    a.add(new Student("Laura",  7)); 
    a.add(new Student("Alex",  9)); 
    System.out.println( a ); 
    Collections.sort( a );
    System.out.println( a ); 
  }
}