Java tutorial
//package com.java2s; //License from project: Open Source License public class Main { public static final char mSeparator = ' '; public static byte[] newByteArrayWithDateInfo(int second, byte[] data2) { byte[] data1 = createDateInfo(second).getBytes(); byte[] retdata = new byte[data1.length + data2.length]; System.arraycopy(data1, 0, retdata, 0, data1.length); System.arraycopy(data2, 0, retdata, data1.length, data2.length); return retdata; } public static String createDateInfo(int second) { String currentTime = System.currentTimeMillis() + ""; while (currentTime.length() < 13) { currentTime = "0" + currentTime; } return currentTime + "-" + second + mSeparator; } }