Java Byte Array Convert To bytesToLength(final byte bytes[])

Description

Takes an array of 4 bytes and converts it to a long, the way the ID3 tag expects it to be converted, which is to say that only 7 bits of each byte is used, giving a max value of 2^28.

License

Apache License

Declaration

public static long bytesToLength(final byte bytes[]) 

Method Source Code

//package com.java2s;
/**//from www.  ja v a  2  s . co  m
 * Copyright 2009 Jason Pelzer.
 * 
 * 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 {
    /**
     * Takes an array of 4 bytes and converts it to a long, the way the ID3 tag expects it to be
     * converted, which is to say that only 7 bits of each byte is used, giving a max value of 2^28.
     */
    public static long bytesToLength(final byte bytes[]) {
        return bytes[0] << 21 | bytes[1] << 14 | bytes[2] << 7 | bytes[3];
    }
}

Related

1. bytesToData(byte[][] fileData)
2. bytesToDec(byte[] bytes)
3. bytesToEntryCreditAddress(byte[] key)
4. BytesToInt(byte abyte0[], int offset)
5. bytesToIpString(byte[] bytes)
6. bytesToMac(byte[] bytes)
7. bytesToMac(final byte[] bytes)
8. bytesToNumber(byte[] buffer, int start, int length)
9. bytesToPdu(byte[] bytes)