Java Power of 2 nextPowerOfTwo(int x)

Description

next Power Of Two

License

Open Source License

Declaration

public static int nextPowerOfTwo(int x) 

Method Source Code

//package com.java2s;
/*//from w w  w.  j av a  2  s. c  om
 * Copyright (c) 2017 VMware Inc. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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 == 0) {
            return 1;
        } else {
            --x;
            x |= x >> 1;
            x |= x >> 2;
            x |= x >> 4;
            x |= x >> 8;
            return (x | (x >> 16)) + 1;
        }
    }

    private static long nextPowerOfTwo(long x) {
        if (x == 0L) {
            return 1L;
        } else {
            --x;
            x |= x >> 1;
            x |= x >> 2;
            x |= x >> 4;
            x |= x >> 8;
            x |= x >> 16;
            return (x | (x >> 32)) + 1L;
        }
    }
}

Related

1. nextPowerOfTwo(int value)
2. nextPowerOfTwo(int x)
3. nextPowerOfTwo(int x)
4. nextPowerOfTwo(int x)
5. nextPowerOfTwo(int x)
6. nextPowerOfTwo(int x)
7. nextPowerOfTwo(int x)
8. nextPowerOfTwo(int x)
9. nextPowerOfTwo(int x)