import java.util.Set;
import java.util.Arrays;
import java.util.HashSet;
public class MyClass {
public static void main(String args[]) {
Set<String> set = new HashSet<>(Arrays.asList("java", "python", "c++", "nodejs"));
String[] arr = set.toArray(new String[0]);
System.out.println(Arrays.toString(arr));
}
}
/*
run:
[python, c++, java, nodejs]
*/