Here you can find the source of readByteBuffer(DataInputStream is)
public static ByteBuffer readByteBuffer(DataInputStream is) throws IOException
//package com.java2s; /*//from ww w . ja v a 2 s . co m * Licensed to the University of California, Berkeley 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.io.DataInputStream; import java.io.IOException; import java.nio.ByteBuffer; public class Main { public static ByteBuffer readByteBuffer(DataInputStream is) throws IOException { int len = is.readInt(); if (len == -1) { return null; } byte[] arr = new byte[len]; for (int k = 0; k < len; k++) { arr[k] = is.readByte(); } return ByteBuffer.wrap(arr); } }