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import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
elements = new String[] { "E", "F" };
set.addAll(Arrays.asList(elements));
System.out.println(set);
}
}
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