Java Hex Calculate toHexString(byte bytes[])

Description

Convert a byte array to its hex encoded representation.

License

Apache License

Parameter

Parameter	Description
bytes	the byte array to convert

Return

the hex encoded representation of the byte array

Declaration

public static String toHexString(byte bytes[]) 

Method Source Code

//package com.java2s;
/*//from   w w w  .j av a  2 s. c  om
 * Copyright 2017 Marcus Portmann
 *
 * 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 {
    /**
     * Convert a byte array to its hex encoded representation.
     *
     * @param bytes the byte array to convert
     *
     * @return the hex encoded representation of the byte array
     */
    public static String toHexString(byte bytes[]) {
        StringBuilder sb = new StringBuilder(bytes.length * 2);

        for (byte aByte : bytes) {
            sb.append(cd(aByte >> 4));
            sb.append(cd(aByte & 0x0f));
        }

        return (sb.toString());
    }

    /**
     * Convers a byte to a Hex character, it is assumed that the byte only has the lower 4 bits used
     * {LSN}
     *
     * @param value the value to convert to a hex character
     *
     * @return the Hex character
     */
    private static char cd(int value) {
        value &= 0x0f;

        if (value >= 10) {
            return ((char) (value - 10 + 'a'));
        } else {
            return ((char) (value + '0'));
        }
    }
}

Related

1. toHexString(byte b[])
2. toHexString(byte b[])
3. toHexString(byte buffer[])
4. toHexString(byte buffer[])
5. toHexString(byte bytes[])
6. toHexString(byte bytes[])
7. toHexString(byte bytes[])
8. toHexString(byte bytes[])
9. toHexString(byte bytes[])