Java tutorial
//package com.java2s; import java.util.HashSet; import java.util.Set; public class Main { public static <T> Set<T> newHashSet(final T... ts) { final Set<T> resultSet = new HashSet<T>(); if (ts == null) { return new HashSet<T>(); } else { for (final T t : ts) { resultSet.add(t); } } return resultSet; } }