Collections Java Tutorial

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