Android Int Bit Set isPowerOfTwo(int v)

Description

returns true if v is a power of two or zero

License

Apache License

Declaration

public static boolean isPowerOfTwo(int v) 

Method Source Code

//package com.java2s;
/**//from   w w w.j a va 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 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. setBit(int number, int count)
2. setBit(int number, int count, boolean value)
3. isBitSet(int b, int bit)
4. isBitSet(int number, int count)
5. clearBit(int number, int count)
6. contains(int bit, int... options)
7. decode(int bits)
8. nextHighestPowerOfTwo(int v)