Writes 4 bytes containing the given int value. - Java File Path IO

Java examples for File Path IO:Byte Array

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Description

Writes 4 bytes containing the given int value.

Demo Code

/* Copyright (c) 2011 Danish Maritime Authority.
 *
 * 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./*from w ww .  j  ava  2  s.  c  o m*/
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        int value = 2;
        byte[] bytes = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int offset = 2;
        System.out.println(java.util.Arrays.toString(writeInt(value, bytes,
                offset)));
    }

    /**
     * Writes 4 bytes containing the given int value. The conversion is done using the big-endian convention.
     *
     * @param value
     *            the value to convert
     * @param offset
     *            the offset in the byte array to write the int
     * @param bytes
     *            the array to write the value into
     * @return the specified byte array
     */
    public static final byte[] writeInt(int value, byte[] bytes, int offset) {
        bytes[offset] = (byte) (value >>> 24);
        bytes[offset + 1] = (byte) (value >>> 16);
        bytes[offset + 2] = (byte) (value >>> 8);
        bytes[offset + 3] = (byte) value;
        return bytes;
    }
}

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