Java Hex Calculate toHex(byte[] digest)

Description

to Hex

License

Apache License

Declaration

protected static String toHex(byte[] digest) 

Method Source Code

//package com.java2s;
/**/*from   w  w  w  .  jav  a2 s. com*/
 * Copyright 2015-2018 Red Hat, Inc, and individual contributors.
 *
 * 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 {
    private static final char[] DIGITS = "0123456789abcdef".toCharArray();

    protected static String toHex(byte[] digest) {
        char[] result = new char[digest.length * 2];

        for (int i = 0; i < digest.length; i++) {
            toChars(digest[i], result, i * 2);
        }
        return new String(result);
    }

    private static void toChars(byte b, char[] result, int position) {
        result[position + 1] = DIGITS[b & 0xF]; // hex digit for the last (least significant) 4 bits of the byte
        result[position] = DIGITS[(b >> 4) & 0xF]; // first bits moved to the last, 0xF to handle "negative" numbers
    }
}

Related

1. toHex(byte[] data, int length)
2. toHex(byte[] data, int off, int len)
3. toHex(byte[] data, int perLine, boolean offset)
4. toHex(byte[] dBytes)
5. toHex(byte[] digest)
6. toHex(byte[] inBytes)
7. toHex(byte[] input)
8. toHex(byte[] key)
9. toHex(byte[] raw)