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JAVA Programming :: Inheritance

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4. What is the output for the below code?

import javutil.Iterator;
import javutil.TreeSet;
public class Test {
public static void main(String... args) {
TreeSet s1 = new TreeSet();
s1.add("one");
s1.add("two");
s1.add("three");
s1.add("one");
Iterator it = s1.iterator();
while (it.hasNext() ) {
System.out.print( it.next() + " " );
}
}
}

Answer: Option A

Explanation :

TreeSet assures no duplicate entries.it will return elements in natural order, which, for Strings means alphabetical.

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