将int输出到字节数组中，只复制整数的后24位。

/*

 * Copyright The Sett Ltd, 2005 to 2014.

 *

 * 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;

/**
 * 时代Java 提 供 
**/

public class Main {

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

        byte[] buf = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

        int offset = 2;

        int value = 2;

        write24BitIntToByteArray(buf, offset, value);

    }


    /**

     * Outputs an int into a byte array, copying only the bottom 24 bits of the integer. The top, sign bit, is lost by

     * this operation, so this only works on positive ints below 2^24.

     *

     * @param buf    The byte array to write to.

     * @param offset The offset within the byte array to output the int.

     * @param value  The int value to write into the array.

     */

    public static void write24BitIntToByteArray(byte[] buf, int offset,// from 时