Here you can find the source of asSortedSet(T... args)
public static <T> SortedSet<T> asSortedSet(T... args)
//package com.java2s; /******************************************************************************* * Copyright (c) 2010-2014 SAP AG and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors:/*from w w w . j av a 2s . c om*/ * SAP AG - initial API and implementation *******************************************************************************/ import java.util.SortedSet; import java.util.TreeSet; public class Main { public static <T> SortedSet<T> asSortedSet(T... args) { SortedSet<T> result = new TreeSet<T>(); if (args != null) { for (T arg : args) { if (arg != null) { result.add(arg); } } } return result; } }