import java.io.*; import java.text.SimpleDateFormat; import java.util.*; import java.util.logging.Logger; public class AndyLogger {     //The defaulted root path of SSLVPN installation     private static String rootPath = "C:\\temp2";     //variable for creating new line     private final static String enter = System.getProperty("line.separator");     private static SimpleDateFormat sdf =         new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");     public static synchronized void log(String fileName, String logMessage)     {         try         {             File folder = new File(rootPath);             if(!folder.exists())             {              folder.mkdir();             }             File file = new File(rootPath + "\\" + fileName + ".log");             if(!file.exists())             {              file.createNewFile();             }             BufferedReader in = new BufferedReader(new FileReader(file));             String str = "";             String strToal = "";             while ((str = in.readLine()) != null)             {                 strToal += (str + enter);             }                 strToal = strToal + (sdf.format(new Date()) + " " + logMessage + enter);             in.close();             BufferedWriter out = new BufferedWriter(new FileWriter(file));             out.write(strToal);             out.close();         }         catch (Exception e)         {             e.printStackTrace();         }     }         public static synchronized void log(String fileName, String[] logMessages)     {         try         {             File folder = new File(rootPath);             if(!folder.exists())             {              folder.mkdir();             }             File file = new File(rootPath + "\\" + fileName + ".log");             if(!file.exists())             {              file.createNewFile();             }             BufferedReader in = new BufferedReader(new FileReader(file));             String str = "";             String strToal = "";             while ((str = in.readLine()) != null)             {                 strToal += (str + enter);             }             for (int i=0; i < logMessages.length ; i++)             {                String logMessage = logMessages[i];                strToal = strToal + (sdf.format(new Date()) + " " + logMessage + enter);             }             in.close();             BufferedWriter out = new BufferedWriter(new FileWriter(file));             out.write(strToal);             out.close();         }         catch (Exception e)         {             e.printStackTrace();         }     }     public static void main(String args[])     {      AndyLogger.log("bug223", "timeisjjja");      String[] logMessages = {"111","222","333"};      AndyLogger.log("bug223", logMessages);     } }