Android Long Bit Shift isPowerOfTwo(long n)

Description

Returns true if the argument is a power of two.

License

Apache License

Parameter

Parameter	Description
n	the number to test

Return

true if the argument is a power of two

Declaration

public static boolean isPowerOfTwo(long n) 

Method Source Code

//package com.java2s;
/*/*  w w w  .java  2 s  .c o m*/
 * 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 the argument is a power of two.
     *
     * @param n the number to test
     * @return true if the argument is a power of two
     */
    public static boolean isPowerOfTwo(long n) {
        return (n > 0) && ((n & (n - 1)) == 0);
    }
}

Related

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