Here you can find the source of readIntArray(ByteBuffer in)
public static int[] readIntArray(ByteBuffer in)
//package com.java2s; /*//w ww. j a v a 2 s . c o 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. */ import java.nio.ByteBuffer; public class Main { public static int[] readIntArray(ByteBuffer in) { int len = readVInt(in); if (len < 0) return null; int[] array = new int[len]; for (int i = 0; i < len; ++i) { array[i] = readVInt(in); } return array; } public static int readVInt(ByteBuffer in) { long n = readVLong(in); if ((n > Integer.MAX_VALUE) || (n < Integer.MIN_VALUE)) { throw new IllegalArgumentException( "value too long to fit in integer"); } return (int) n; } public static long readVLong(ByteBuffer in) { byte firstByte = in.get(); int len = decodeVIntSize(firstByte); if (len == 1) { return firstByte; } long i = 0; for (int idx = 0; idx < len - 1; idx++) { byte b = in.get(); i = i << 8; i = i | (b & 0xFF); } return (isNegativeVInt(firstByte) ? (i ^ -1L) : i); } private static int decodeVIntSize(byte value) { if (value >= -112) { return 1; } else if (value < -120) { return -119 - value; } return -111 - value; } private static boolean isNegativeVInt(byte value) { return value < -120 || (value >= -112 && value < 0); } }