Here you can find the source of nextPowerOfTwo(int x)
public static int nextPowerOfTwo(int x)
//package com.java2s; /*//ww w . j av a 2 s .co m * Copyright (C) 2015 Dell, Inc. * * 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 nextPowerOfTwo(int x) { if ((x & (x - 1)) != 0) x = Integer.highestOneBit(x) * 2; if ((x & (x - 1)) != 0) throw new RuntimeException("Error in nextPowerOfTwo"); return x; } }