Java tutorial
//package com.java2s; /* * Hibernate Search, full-text search for your domain model * * License: GNU Lesser General Public License (LGPL), version 2.1 or later * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>. */ import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.List; public class Main { public static <T> List<T> toImmutableList(final Collection<T> c) { if (c.isEmpty()) { return Collections.emptyList(); } else { return Collections.unmodifiableList(new ArrayList<T>(c)); } } }