Java Hex Calculate toHexString(final byte[] bytes)

Description

Converts a byte-array to a lower case hex-string.

License

Apache License

Parameter

Parameter	Description
bytes	the bytes to encode.

Exception

Parameter	Description
NullPointerException	if <tt>bytes</tt> is <tt>null</tt>.

Return

a hex-encoded string of length bytes.length * 2.

Declaration

public static String toHexString(final byte[] bytes) 

Method Source Code

//package com.java2s;
/*//from   w w  w  .j  av  a 2 s .c o m
 * Copyright 2007  T-Rank AS
 * 
 * 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 final char[] HEX_CHARS = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b',
            'c', 'd', 'e', 'f' };

    /**
     * Converts a byte-array to a lower case hex-string.
     * 
     * @param bytes the bytes to encode.
     * 
     * @return a hex-encoded string of length <tt>bytes.length * 2</tt>.
     * 
     * @throws NullPointerException if <tt>bytes</tt> is <tt>null</tt>.
     */
    public static String toHexString(final byte[] bytes) {
        final StringBuilder buf = new StringBuilder(bytes.length * 2);
        for (byte b : bytes) {
            buf.append(HEX_CHARS[(b >> 4) & 0xf]);
            buf.append(HEX_CHARS[b & 0xf]);
        }
        return buf.toString();
    }
}

Related

1. toHexString(final byte[] bs)
2. toHexString(final byte[] bs, final char[] myDigits)
3. toHexString(final byte[] buffer)
4. toHexString(final byte[] bytes)
5. toHexString(final byte[] bytes)
6. toHexString(final byte[] bytes)
7. toHexString(final byte[] bytes)
8. toHexString(final byte[] data)
9. toHexString(final byte[] data)