Java Power of 2 nextPowerOf2(int n)

Description

Returns the next power of 2 >= n.

License

Apache License

Declaration

public static int nextPowerOf2(int n) 

Method Source Code

//package com.java2s;
/*//from  w  w w.  ja  v  a  2s .co  m
 * Copyright 2013 Google 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 {
    /**
     * Returns the next power of 2 >= n.
     */
    public static int nextPowerOf2(int n) {
        if (n == 0) {
            return 1;
        }
        int b = Integer.highestOneBit(n);
        return b == n ? n : b << 1;
    }
}

Related

1. nextPower(int v, int power)
2. nextPower2(int n)
3. nextPowerOf2(final int n)
4. nextPowerOf2(int n)
5. nextPowerOf2(int n)
6. nextPowerOf2(int n)
7. nextPowerOf2(int v)
8. nextPowerOf2(int x)
9. nextPowerOf2(int x)