Java Hex Calculate toHexString(final byte b)

Description

to Hex String

License

Apache License

Declaration

public static String toHexString(final byte b) 

Method Source Code

//package com.java2s;
/*/*from w ww  .  ja va  2  s .  co  m*/
 * Copyright (C) 2006 The Android Open Source Project
 * 
 * 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 final static char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
            'E', 'F' };

    public static String toHexString(final byte b) {
        return toHexString(toByteArray(b));
    }

    public static String toHexString(final byte[] array) {
        return toHexString(array, 0, array.length);
    }

    public static String toHexString(final byte[] array, final int offset, final int length) {
        final char[] buf = new char[length * 2];

        int bufIndex = 0;
        for (int i = offset; i < (offset + length); i++) {
            final byte b = array[i];
            buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F];
            buf[bufIndex++] = HEX_DIGITS[b & 0x0F];
        }

        return new String(buf);
    }

    public static String toHexString(final int i) {
        return toHexString(toByteArray(i));
    }

    public static byte[] toByteArray(final byte b) {
        final byte[] array = new byte[1];
        array[0] = b;
        return array;
    }

    public static byte[] toByteArray(final int i) {
        final byte[] array = new byte[4];

        array[3] = (byte) (i & 0xFF);
        array[2] = (byte) ((i >> 8) & 0xFF);
        array[1] = (byte) ((i >> 16) & 0xFF);
        array[0] = (byte) ((i >> 24) & 0xFF);

        return array;
    }
}

Related

1. toHexString(byte[] val)
2. toHexString(byte[] value)
3. toHexString(byte[] value)
4. toHexString(byte[] value, int startOffset, int maxLength, boolean uppercase, char separator)
5. toHexString(char c)
6. toHexString(final byte b)
7. toHexString(final byte hex)
8. toHexString(final byte value)
9. toHexString(final byte[] arr)