Java Integer From intFromByteArray(final byte[] byteArray)

Description

int From Byte Array

License

Apache License

Declaration

static int intFromByteArray(final byte[] byteArray) 

Method Source Code

//package com.java2s;
/*//from   w w w .j av a2  s .c  o m
 * =============================================================================
 * 
 *   Copyright (c) 2007-2010, The JASYPT team (http://www.jasypt.org)
 * 
 *   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 {
    static int intFromByteArray(final byte[] byteArray) {

        if (byteArray == null || byteArray.length == 0) {
            throw new IllegalArgumentException(
                    "Cannot convert an empty array into an int");
        }
        int result = (0xff & byteArray[0]);
        for (int i = 1; i < byteArray.length; i++) {
            result = (result << 8) | (0xff & byteArray[i]);
        }

        return result;
    }
}

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7. intFromBytes(byte[] b)
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9. intFromBytes(byte[] buffer)