Collections and Generics

Question : 53 of 53

Marks: +1, -0

Given:

1. TreeSet map = new TreeSet();
2. map.add("one");
3. map.add("two");
4. map.add("three");
5. map.add("four");
6. map.add("one");
7. Iterator it = map.iterator();
8. while (it.hasNext() ) {
9.   System.out.print( it.next() + " " );
10. }

What is the result?

Compilation fails.
one two three four
four three two one
four one three two
one two three four one
one four three two one
An exception is thrown at runtime.
The print order is not guaranteed

Validate

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