Java Byte Array to Int bytes2int(byte[] src)

Description

bytesint

License

Apache License

Declaration

public static int bytes2int(byte[] src) 

Method Source Code

//package com.java2s;
/*//  www. j a  va  2s . co m
 *  Copyright (c) 2012-2014 RONDHUIT Co.,Ltd.
 *  
 *   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 {

    public static int bytes2int(byte[] src) {
        return bytes2int(src, 0, src.length);
    }

    public static int bytes2int(byte[] src, int offset, int length) {
        if (length == 2) {
            int val = src[offset + 0] & 0xFF;
            return (val << 8) + (src[offset + 1] & 0xFF);
        } else if (length == 4) {
            int val = src[offset + 0] & 0xFF;
            val = (val << 8) + (src[offset + 1] & 0xFF);
            val = (val << 8) + (src[offset + 2] & 0xFF);
            return (val << 8) + (src[offset + 3] & 0xFF);
        } else {
            throw new IllegalArgumentException("invalid length of src byte array");
        }
    }
}

Related

1. bytes2int(byte[] bytes, int begin)
2. bytes2Int(byte[] bytes, int defaultValue)
3. bytes2Int(byte[] bytes, int offset)
4. bytes2int(byte[] bytes, int offset, boolean bigEndian)
5. bytes2int(byte[] in, int index1, int index2, int index3)
6. bytes2Int(byte[] src, int start)
7. Bytes2Int16(byte[] sour, int offset)
8. Bytes2Int32(byte[] sour, int offset)
9. Bytes2Int64(byte[] sour, int offset)