Sets the long at the given offset of the byte array. - Java java.lang

Java examples for java.lang:byte array to long

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Description

Sets the long at the given offset of the byte array.

Demo Code

/*// w  w w.ja  v a  2  s .com
 * Mckoi Software ( http://www.mckoi.com/ )
 * Copyright (C) 2000 - 2015  Diehl and Associates, 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.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        long value = 2;
        byte[] arr = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int offset = 2;
        setLong(value, arr, offset);
    }

    /**
     * Sets the long at the given offset of the byte array.
     */
    public static final void setLong(long value, byte[] arr, int offset) {
        arr[offset + 0] = (byte) ((value >>> 56) & 0xFF);
        arr[offset + 1] = (byte) ((value >>> 48) & 0xFF);
        arr[offset + 2] = (byte) ((value >>> 40) & 0xFF);
        arr[offset + 3] = (byte) ((value >>> 32) & 0xFF);
        arr[offset + 4] = (byte) ((value >>> 24) & 0xFF);
        arr[offset + 5] = (byte) ((value >>> 16) & 0xFF);
        arr[offset + 6] = (byte) ((value >>> 8) & 0xFF);
        arr[offset + 7] = (byte) ((value >>> 0) & 0xFF);
    }
}

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