Here you can find the source of toByteArray(Object value)
private static byte[] toByteArray(Object value)
//package com.java2s; /*------------------------------------------------------------------------------------------------- _______ __ _ _______ _______ ______ ______ |_____| | \ | | |______ | \ |_____] | | | \_| | ______| |_____/ |_____] //from w w w . j a va2s .c om Copyright (c) 2016, antsdb.com and/or its affiliates. All rights reserved. *-xguo0<@ This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License, version 3, as published by the Free Software Foundation. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <https://www.gnu.org/licenses/agpl-3.0.txt> -------------------------------------------------------------------------------------------------*/ public class Main { private static byte[] toByteArray(Object value) { if (value == null) { return null; } else if (value instanceof byte[]) { return (byte[]) value; } else { throw new IllegalArgumentException(); } } }