Checking if a HashSet contains certain value in Java

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Demo {
	public static void main(String[] a) {
		Integer arr[] = { 50, 100, 150, 200, 250, 300 };
		Set<Integer>set = new HashSet<Integer>(Arrays.asList(arr));
		System.out.println(set.contains(200));
		System.out.println(set.contains(150));
		System.out.println(set.contains(100));
		System.out.println(set.contains(10));
	}
}