Java ByteOrder getInt(byte[] b, int start, int end, ByteOrder byteOrder)

Description

get an int value from a byte array

License

Apache License

Parameter

Parameter	Description
b	the byte array
start	the starting index position inside byte array
end	the ending index position inside byte array
byteOrder	byte order

Declaration

public static int getInt(byte[] b, int start, int end, ByteOrder byteOrder) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2015 alladin-IT GmbH/* w ww.  j a  va2 s .com*/
 *
 * 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.
 *******************************************************************************/

import java.nio.ByteOrder;

public class Main {
    /**
     * get an int value from a byte array
     * @param b the byte array
     * @param start the starting index position inside byte array
     * @param end the ending index position inside byte array
     * @param byteOrder byte order
     * @return
     */
    public static int getInt(byte[] b, int start, int end, ByteOrder byteOrder) {
        return (int) getLong(b, start, end, byteOrder);
    }

    /**
     * 
     * @param b
     * @param start
     * @param end
     * @param byteOrder
     * @return
     */
    public static long getLong(byte[] b, int start, int end, ByteOrder byteOrder) {
        long i = 0;
        for (int n = 0; n <= (end - start); n++) {
            i <<= 8;
            i += ByteOrder.BIG_ENDIAN.equals(byteOrder) ? (b[n + start] & 0xff)
                    : (b[(end - start) - (n - start)] & 0xff);
        }

        return i;
    }
}

Related

1. convertBytesToBigInteger(byte[] bytes, ByteOrder byteOrder, boolean isSigned)
2. createWord(final ByteOrder aByteOrder, final int aMSB, final int aLSB)
3. decode(final ByteOrder aExpectedByteOrder, final byte... aBytes)
4. get24BitInt(byte b1, byte b2, byte b3, ByteOrder order)
5. getByteOrder(final String value)
6. getInt(final int offset, final byte[] buffer, final ByteOrder byteOrder)
7. getLong(byte[] b, int start, int end, ByteOrder byteOrder)
8. getMostSignificantByte(byte[] bytes, ByteOrder byteOrder)
9. getUnsignedShort(final int offset, final byte[] buffer, final ByteOrder byteOrder)