Returns a read-only list. - Android java.util

Android examples for java.util:List

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Description

Returns a read-only list.

Demo Code

/*/*from  ww  w.j av a  2s.co m*/
 * --------------------
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2008-2009 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of the Common Development
 * and Distribution License("CDDL") (the "License").  You may not use this file
 * except in compliance with the License.
 *
 * You can obtain a copy of the License at
 * http://opensource.org/licenses/cddl1.php
 * See the License for the specific language governing permissions and limitations
 * under the License.
 *
 * When distributing the Covered Code, include this CDDL Header Notice in each file
 * and include the License file at http://opensource.org/licenses/cddl1.php.
 * If applicable, add the following below this CDDL Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
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 */
//package com.book2s;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class Main {
    public static void main(String[] argv) {
        List list = java.util.Arrays.asList("asdf", "book2s.com");
        System.out.println(asReadOnlyList(list));
    }

    /**
     * Returns a read-only list. The list is backed by the original so no copy
     * is made.
     *
     * @param <T>
     *            The type of the list
     * @param list
     *            The list or null.
     * @return A read-only proxy on the original list.
     */
    public static <T> List<T> asReadOnlyList(List<T> list) {
        if (list == null) {
            list = new ArrayList<T>();
        }
        return Collections.unmodifiableList(list);
    }
}

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