Append one object to an array - Java Collection Framework

Java examples for Collection Framework:Array Auto Increment

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Description

Append one object to an array

Demo Code

/** /*www .  j  a  v  a 2 s.co  m*/
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Initial Developer of this code is Technology Concepts 
 * and Design, Inc. 
 * Copyright (C) 2000 Technology Concepts and Design, Inc.  All
 * Rights Reserved.
 * 
 * Contributor(s):  Eric B. Ridge (Technology Concepts and Design, Inc.)
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 * 
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        Object[] array = new String[] { "1", "abc", "level", null,
                "java2s.com", "asdf 123" };
        Object toAppend = "java2s.com";
        System.out.println(java.util.Arrays.toString(appendToArray(array,
                toAppend)));
    }

    /**
     * Append one object to an array<p>
     * 
     * Same as: <code>appendToArray(toArray, new Object[] {toAppend})</code>
     * 
     * @param array the array to append to
     * @param toAppend the object to append
     *
     * @return a new array containing all objects.  Castable into type of array[0]
     */
    public static Object[] appendToArray(Object[] array, Object toAppend) {
        return appendToArray(array, new Object[] { toAppend });
    }

    /**
     * Append one array to another<p>
     * 
     * @param array the array to append to
     * @param toAppend the array to append
     * 
     * @return a new array containing all objects.  Castable into type of array[0]
     */
    public static Object[] appendToArray(Object[] array, Object[] toAppend) {
        Class c;
        if (array.length > 0)
            c = array[0].getClass();
        else
            c = toAppend[0].getClass();

        Object[] tmp = (Object[]) java.lang.reflect.Array.newInstance(c,
                array.length + toAppend.length);
        System.arraycopy(array, 0, tmp, 0, array.length);
        System.arraycopy(toAppend, 0, tmp, array.length, toAppend.length);

        return tmp;
    }
}

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