Android Long Bit Shift isPowerOfTwo(long v)

Description

returns true if v is a power of two or zero

License

Apache License

Declaration

public static boolean isPowerOfTwo(long v) 

Method Source Code

//package com.java2s;
/**/* w w w. j  a va2s.c om*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 true if v is a power of two or zero*/
    public static boolean isPowerOfTwo(int v) {
        return ((v & (v - 1)) == 0);
    }

    /** returns true if v is a power of two or zero*/
    public static boolean isPowerOfTwo(long v) {
        return ((v & (v - 1)) == 0);
    }
}

Related

1. isPowerOfTwo(long n)
2. flip32(long num)
3. swap(long x)