Create a read-only Set in Java

/*from   w  ww  . j a v a2  s.  co m*/
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class Main {
  public static void main(String[] argv) throws Exception {

    List stuff = Arrays.asList(new String[] { "a", "b" });

    Set set = new HashSet(stuff);
    set = Collections.unmodifiableSet(set);


    try {
      set.add("new value");
    } catch (UnsupportedOperationException e) {
      System.out.println(e.getMessage());
    }

  }
}