Helper function to prepend an Object to an array and return the new array. - Java Collection Framework

Java examples for Collection Framework:Array Element

  1. HOME
  2. Java
  3. Collection Framework
  4. Array Element

Description

Helper function to prepend an Object to an array and return the new array.

Demo Code

/*//from w  w w  .j  av a2  s .  c o m
    Copyright 1996-2008 Ariba, Inc.

    Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

    $Id: //ariba/platform/util/core/ariba/util/core/ArrayUtil.java#9 $
 */
//package com.java2s;

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

    /**
         Helper function to prepend an Object to an array and return the
         new array.

         @param a the Object to be prepended
         @param in the array to prepend a onto

         @return a new Object array containing a + the elements of in
         @aribaapi documented
     */
    public static Object[] prepend(Object a, Object[] in) {
        Object[] out = new Object[in.length + 1];
        out[0] = a;
        System.arraycopy(in, 0, out, 1, in.length);
        return out;
    }
}

Related Tutorials