将以位为索引的位设置为1。

/*******************************************************************************

 *   Copyright 2014 Analog Devices, Inc.

 *

 *   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.

 ********************************************************************************/

//package com.nowjava;
/* 来自 N o w  J a v a  . c o m*/

public class Main {

    public static void main(String[] argv) throws Exception {

        int bits = 2;

        int index = 2;

        System.out.println(setBit(bits, index));

    }


    /**

     * Sets bit at {@code index} in {@code bits} to one.

     * 

     * @param bits

     * @param index must be in the range [0,31] identifies which bit to clear.

     */

    public static int setBit(int bits, int index) {

        return bits | (1 << index);

    }