Android Hex String Create toHex(byte b)

Description

Encodes a single byte to hex symbols.

License

Apache License

Parameter

Parameter	Description

Return

the resulting hex string

Declaration

public static String toHex(byte b) 

Method Source Code

//package com.java2s;
/**//from  ww w .j a  v a2  s . c  om
 * Copyright 2011 bccapi.com
 *
 * 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 {
    /**
     * Encodes an array of bytes as hex symbols.
     * 
     * @param bytes
     *           the array of bytes to encode
     * @return the resulting hex string
     */
    public static String toHex(byte[] bytes) {
        return toHex(bytes, null);
    }

    /**
     * Encodes an array of bytes as hex symbols.
     * 
     * @param bytes
     *           the array of bytes to encode
     * @param separator
     *           the separator to use between two bytes, can be null
     * @return the resulting hex string
     */
    public static String toHex(byte[] bytes, String separator) {
        return toHex(bytes, 0, bytes.length, separator);
    }

    /**
     * Encodes an array of bytes as hex symbols.
     * 
     * @param bytes
     *           the array of bytes to encode
     * @param offset
     *           the start offset in the array of bytes
     * @param length
     *           the number of bytes to encode
     * @return the resulting hex string
     */
    public static String toHex(byte[] bytes, int offset, int length) {
        return toHex(bytes, offset, length, null);
    }

    /**
     * Encodes a single byte to hex symbols.
     * 
     * @param byte the byte to encode
     * @return the resulting hex string
     */
    public static String toHex(byte b) {
        StringBuilder sb = new StringBuilder();
        appendByteAsHex(sb, b);
        return sb.toString();
    }

    /**
     * Encodes an array of bytes as hex symbols.
     * 
     * @param bytes
     *           the array of bytes to encode
     * @param offset
     *           the start offset in the array of bytes
     * @param length
     *           the number of bytes to encode
     * @param separator
     *           the separator to use between two bytes, can be null
     * @return the resulting hex string
     */
    public static String toHex(byte[] bytes, int offset, int length,
            String separator) {
        StringBuffer result = new StringBuffer();
        for (int i = 0; i < length; i++) {
            int unsignedByte = bytes[i + offset] & 0xff;

            if (unsignedByte < 16) {
                result.append("0");
            }

            result.append(Integer.toHexString(unsignedByte));
            if (separator != null && i + 1 < length) {
                result.append(separator);
            }
        }
        return result.toString();
    }

    public static void appendByteAsHex(StringBuilder sb, byte b) {
        int unsignedByte = b & 0xFF;
        if (unsignedByte < 16) {
            sb.append("0");
        }
        sb.append(Integer.toHexString(unsignedByte));
    }
}

Related

1. hexDecode(String str, byte[] ba, int len)
2. hexEncode(byte[] aInput)
3. hexify(byte bytes[])
4. toHex(String str)
5. toHex(String txt)
6. toHex(byte input[])
7. toHex(byte[] bytes)
8. toHex(byte[] data)
9. toHex(int address)