Here you can find the source of toByteArray(ByteBuffer bytes)
public static byte[] toByteArray(ByteBuffer bytes)
//package com.java2s; /*// ww w . j a va 2s .c o m * This file is part of Multimap. http://multimap.io * * Copyright (C) 2015-2016 Martin Trenkmann * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.nio.ByteBuffer; import java.nio.charset.Charset; public class Main { /** * An UTF-8 charset constant used for encoding/decoding strings to/from byte arrays. */ public static final Charset UTF8 = Charset.forName("UTF-8"); /** * Copies the byte buffer's content to a newly allocated byte array. */ public static byte[] toByteArray(ByteBuffer bytes) { byte[] array = new byte[bytes.capacity()]; bytes.get(array); return array; } /** * Serializes the string's content to an UTF-8 encoded byte array. */ public static byte[] toByteArray(String string) { return string.getBytes(UTF8); } }