Returns a hexadecimal representation of the given byte array. - Java java.lang

Java examples for java.lang:byte Array to hex

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Description

Returns a hexadecimal representation of the given byte array.

Demo Code


//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] bytes = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(asHex(bytes));
    }//from ww  w  .j  a va2  s  .c  om

    /**
     * Returns a hexadecimal representation of the given byte array.
     * 
     * @param bytes
     *            the array to output to an hex string
     * @return the hex representation as a string
     */
    public static String asHex(byte[] bytes) {
        return asHex(bytes, null);
    }

    /**
     * Returns a hexadecimal representation of the given byte array.
     * 
     * @param bytes
     *            the array to output to an hex string
     * @param separator
     *            the separator to use between each byte in the output string. If null no char is inserted between each byte value.
     * @return the hex representation as a string
     */
    public static String asHex(byte[] bytes, String separator) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < bytes.length; i++) {
            String code = Integer.toHexString(bytes[i] & 0xFF);
            if ((bytes[i] & 0xFF) < 16) {
                sb.append('0');
            }

            sb.append(code);

            if (separator != null && i < bytes.length - 1) {
                sb.append(separator);
            }
        }

        return sb.toString();
    }
}

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