Java Byte Array to Int bytesToInt(byte[] bytes)

Description

Converts a byte array to an int.

License

Apache License

Parameter

Parameter	Description
bytes	the little endian byte array that shall be converted to int

Exception

Parameter	Description
IllegalArgumentException	if byte array contains more than 4 bytes

Return

int value

Declaration

public static int bytesToInt(byte[] bytes) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2014 Katja Hahn/*from w  w w .  ja v a  2  s.c  o  m*/
 * 
 * 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.
 ******************************************************************************/

public class Main {
    /**
     * Converts a byte array to an int. The bytes are considered unsigned and
     * little endian (first byte is the least significant).
     * 
     * @param bytes
     *            the little endian byte array that shall be converted to int
     * @return int value
     * @throws IllegalArgumentException
     *             if byte array contains more than 4 bytes
     */
    public static int bytesToInt(byte[] bytes) {
        int value = 0;
        for (int i = 0; i < bytes.length; i++) {
            int shift = 8 * i;
            value += (bytes[i] & 0xFF) << shift;
        }
        return value;
    }
}

Related

1. bytesToInt(byte[] b, int offset)
2. bytesToInt(byte[] buf, int offset)
3. bytesToInt(byte[] buf, int startIdx)
4. bytesToInt(byte[] buff, int off, int len)
5. bytesToInt(byte[] bytes)
6. bytesToInt(byte[] bytes)
7. bytesToInt(byte[] bytes)
8. bytesToInt(byte[] bytes)
9. bytesToInt(byte[] bytes)