Oracle Exam 1Z0-809 Topic 12 Question 38 Discussion

Given:

class Vehicle implements Comparable{

int vno;

String name;

public Vehicle (int vno, String name) {

this.vno = vno,;

this.name = name;

}

public String toString () {

return vno + '':'' + name;

}

public int compareTo(Vehicle o) {

return this.name.compareTo(o.name);

}

and this code fragment:

Set vehicles = new TreeSet <> ();

vehicles.add(new Vehicle (10123, ''Ford''));

vehicles.add(new Vehicle (10124, ''BMW''));

System.out.println(vehicles);

What is the result?