Java Hex Calculate toHEX(byte[] ba)

Description

utility method to convert a byte array to a hexadecimal string.

License

Open Source License

Parameter

Parameter	Description
ba	array of bytes to be converted into hex

Return

hex representation of byte array

Declaration

public static String toHEX(byte[] ba) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /** array mapping hex value (0-15) to corresponding hex digit (0-9a-f). */
    public static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
            'e', 'f' };

    /**/*from   w  w w  . j a v a  2s  . c o  m*/
     * utility method to convert a byte array to a hexadecimal string.
     * <p>
     * Each byte of the input array is converted to 2 hex symbols,
     * using the HEX_DIGITS array for the mapping, with spaces after each pair.
     * @param ba array of bytes to be converted into hex
     * @return hex representation of byte array     
     */
    public static String toHEX(byte[] ba) {
        int length = ba.length;
        char[] buf = new char[length * 3];
        for (int i = 0, j = 0, k; i < length;) {
            k = ba[i++];
            buf[j++] = HEX_DIGITS[(k >>> 4) & 0x0F];
            buf[j++] = HEX_DIGITS[k & 0x0F];
            buf[j++] = ' ';
        }
        return new String(buf);
    }

    /**
     * utility method to convert a short array to a hexadecimal string.
     * <p>
     * Each word of the input array is converted to 4 hex symbols,
     * using the HEX_DIGITS array for the mapping, with spaces after every 4.
     * @param ia array of shorts to be converted into hex
     * @return hex representation of short array     
     */
    public static String toHEX(short[] ia) {
        int length = ia.length;
        char[] buf = new char[length * 5];
        for (int i = 0, j = 0, k; i < length;) {
            k = ia[i++];
            buf[j++] = HEX_DIGITS[(k >>> 12) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 8) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 4) & 0x0F];
            buf[j++] = HEX_DIGITS[k & 0x0F];
            buf[j++] = ' ';
        }
        return new String(buf);
    }

    /**
     * utility method to convert an int array to a hexadecimal string.
     * <p>
     * Each word of the input array is converted to 8 hex symbols,
     * using the HEX_DIGITS array for the mapping, with spaces after every 4.
     * @param ia array of ints to be converted into hex
     * @return hex representation of int array     
     */
    public static String toHEX(int[] ia) {
        int length = ia.length;
        char[] buf = new char[length * 10];
        for (int i = 0, j = 0, k; i < length;) {
            k = ia[i++];
            buf[j++] = HEX_DIGITS[(k >>> 28) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 24) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 20) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 16) & 0x0F];
            buf[j++] = ' ';
            buf[j++] = HEX_DIGITS[(k >>> 12) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 8) & 0x0F];
            buf[j++] = HEX_DIGITS[(k >>> 4) & 0x0F];
            buf[j++] = HEX_DIGITS[k & 0x0F];
            buf[j++] = ' ';
        }
        return new String(buf);
    }
}

Related

1. toHex(byte[] b)
2. toHex(byte[] b)
3. toHex(byte[] b)
4. toHex(byte[] b)
5. toHex(byte[] b, int off, int len, String separator)
6. toHex(byte[] buffer)
7. toHex(byte[] buffer)
8. toHex(byte[] bytes)
9. toHex(byte[] bytes)