Here you can find the source of nextPowerTwo(int initialNum)
public static int nextPowerTwo(int initialNum)
//package com.java2s; /******************************************************************************* * Copyright (c) 2015 Low Latency Trading Limited : Author Richard Rose * Licensed 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 { public static int nextPowerTwo(int initialNum) { // Find a power of 2 >= initialCapacity int num = 1; while (num < initialNum) num <<= 1;// www .j a v a 2 s . c o m return num; } }