Here you can find the source of copy(byte[] from)
static byte[] copy(byte[] from)
//package com.java2s; /*/*from www . java 2 s .co m*/ * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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. * */ public class Main { /** * Create a copy of the given array - or return null if the * argument is null. */ static byte[] copy(byte[] from) { if (from != null) { byte[] to = new byte[from.length]; System.arraycopy(from, 0, to, 0, to.length); return to; } return null; } }