Returns a copy of the given array of the given length. - Java Collection Framework

Java examples for Collection Framework:Array Copy

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

Description

Returns a copy of the given array of the given length.

Demo Code

/*//from  w  ww .j a v  a  2s.  c  o  m
Copyright (c) 2005 Health Market Science, Inc.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
USA

You can contact Health Market Science at info@healthmarketscience.com
or at the following address:

Health Market Science
2700 Horizon Drive
Suite 200
King of Prussia, PA 19406
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] arr = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int newLength = 2;
        System.out.println(java.util.Arrays
                .toString(copyOf(arr, newLength)));
    }

    /**
     * Returns a copy of the given array of the given length.
     */
    public static byte[] copyOf(byte[] arr, int newLength) {
        return copyOf(arr, 0, newLength);
    }

    /**
     * Returns a copy of the given array of the given length starting at the
     * given position.
     */
    public static byte[] copyOf(byte[] arr, int offset, int newLength) {
        byte[] newArr = new byte[newLength];
        int srcLen = arr.length - offset;
        System.arraycopy(arr, offset, newArr, 0,
                Math.min(srcLen, newLength));
        return newArr;
    }
}

Related Tutorials