Here you can find the source of newHashSet()
public static <E> HashSet<E> newHashSet()
//package com.java2s; /*// w w w. j a va 2 s . c om * Copyright (C) 2012 Davy Leggieri * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ import java.util.HashSet; public class Main { public static <E> HashSet<E> newHashSet() { return new HashSet<E>(); } }