// A TeachingAssistant object represents a teaching assistant.

public class TeachingAssistant implements Comparable<TeachingAssistant> {
    private String name;
    private int experience; // quarters worked

    // Creates a teaching assistant with the given name and quarters of
    // experience
    // Throws IllegalArgumentException if name is null or experience is negative
    public TeachingAssistant(String name, int experience) {
        if (name == null || experience < 0) {
            throw new IllegalArgumentException();
        }
        this.name = name;
        this.experience = experience;
    }

    // Returns quarters of experience.
    public int getExperience() {
        return experience;
    }
 
    // Returns a string containing the TA's name and quarters of experience.
    public String toString() {
        return name + " (" + experience + ")";
    }
    
   public int compareTo(TeachingAssistant other) {
      if(experience != other.experience) {
         return experience - other.experience;
      } else {
         return name.compareTo(other.name);
      }
   }
}