Here you can find the source of getActiveArray(ByteBuffer buffer)
public static byte[] getActiveArray(ByteBuffer buffer)
//package com.java2s; /*/* w w w . j a v a 2 s .c om*/ * 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. */ import java.nio.ByteBuffer; public class Main { public static byte[] getActiveArray(ByteBuffer buffer) { byte[] ret = new byte[buffer.remaining()]; if (buffer.hasArray()) { byte[] array = buffer.array(); System.arraycopy(array, buffer.arrayOffset() + buffer.position(), ret, 0, ret.length); } else { buffer.slice().get(ret); } return ret; } }