Util.java Source code

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Here is the source code for Util.java

Source

import java.util.Calendar;
import java.util.Date;

public class Util {

    /**
     * Creates byte array representation of HEX string.<br>
     * 
     * @param s
     *            string to parse
     * @return
     */
    public static byte[] fromHexString(String s) {
        int length = s.length() / 2;
        byte[] bytes = new byte[length];
        for (int i = 0; i < length; i++) {
            bytes[i] = (byte) ((Character.digit(s.charAt(i * 2), 16) << 4)
                    | Character.digit(s.charAt((i * 2) + 1), 16));
        }
        return bytes;
    }

    /**
     * Creates HEX String representation of supplied byte array.<br/>
     * Each byte is represented by a double character element from 00 to ff
     * 
     * @param fieldData
     *            to be tringed
     * @return
     */
    public static String toHexString(byte[] fieldData) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < fieldData.length; i++) {
            int v = (fieldData[i] & 0xFF);
            if (v <= 0xF) {
                sb.append("0");
            }
            sb.append(Integer.toHexString(v));
        }
        return sb.toString();
    }
}