Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/**
 * 
 * Copyright 2008 - 2011
 * 
 * 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.
 * 
 * @project loonframework
 * @author chenpeng
 * @email ceponline@yahoo.com.cn
 * @version 0.1.2
 */

public class Main {

    public static int nextPowerOfTwo(int n) {
        if (isPowerOfTwo(n)) {
            return n;
        }
        int i = 0;
        for (;;) {
            i++;
            if (Math.pow(2, i) >= n) {
                return (int) Math.pow(2, i);
            }
        }
    }

    public static boolean isPowerOfTwo(int n) {
        return (n != 0) && ((n & (n - 1)) == 0);
    }
}