Java Double Number Round roundDownToPowerOf2(int value)

Description

Decrements the given number down to the closest power of two.

License

Apache License

Parameter

Parameter	Description
value	The value to round down.

Return

The closest value that is a power of to and less or equal than the given value.

Declaration

public static int roundDownToPowerOf2(int value) 

Method Source Code

//package com.java2s;
/*//  w w w  .  j ava  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 {
    /**
     * Decrements the given number down to the closest power of two. If the argument is a
     * power of two, it remains unchanged.
     * 
     * @param value The value to round down.
     * @return The closest value that is a power of to and less or equal than the given value.
     */
    public static int roundDownToPowerOf2(int value) {
        return Integer.highestOneBit(value);
    }
}

Related

1. roundDown(long size, long roundBoundary)
2. roundDown(long val, long delta)
3. roundDownTo(int a, int quanta)
4. roundDownToNearest(double number, double nearest)
5. roundDownToNearestK(float v, int k)