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why cannot delete file

Posts: 10
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Dear all,
My problem here is after I ran my code, I cant delete the origin file that I have ftp it. For example, I ftp C:\a\a.txt to /home/kwwong/upload/a.txt. After doing this, I need to delete C:\a\a.txt but I got this message "Cannot delete a.txt:It is being used by another person or program".
Anyone knows what wrong with my code here?
Any helps are appreciated. Thank you very much.
BufferedReader reader = null;
Ftp ftp = null;
String tmp = null;
InetAddress Inet = null;
String lStrUploadFileLog = "C:/FTPLog/FTPLog_05122003.log";
String lStrUploadFilePath = "/home/kwwong/upload/";
String lStrFTP_USER = "kwwong";
String lStrFTP_PWD = "password";
String lStrFTP_IP = "";
String lStrLogFileDate= "LOG_FILE_DATE";
reader = new BufferedReader(new FileReader(new File(lStrUploadFileLog)));
Inet = InetAddress.getByName(lStrFTP_IP);
tmp = reader.readLine();
ftp = new Ftp(Inet,lStrFTP_USER,lStrFTP_PWD);

if(tmp != null){
System.out.println("lStrUploadFileLog = "+lStrUploadFileLog);
System.out.println("lStrUploadFilePath+lStrLogFileDate = "+(lStrUploadFilePath+lStrLogFileDate));
System.out.println("tmp = "+tmp);
StringTokenizer strtmp = new StringTokenizer(tmp,",");
int size_strtmp = strtmp.countTokens();

while (size_strtmp>0){
String lStrUploadFile = strtmp.nextToken();
StringTokenizer strlStrUploadFile = new StringTokenizer(lStrUploadFile,"\\");
int size_strlStrUploadFile = strlStrUploadFile.countTokens();
String substr = lStrUploadFile.substring(lStrUploadFile.lastIndexOf("\\")+1,lStrUploadFile.length());


System.out.println("File(s) download completed!");
try {
File ff = new File(lStrUploadFileLog);
boolean state = ff.delete();
} catch ( SecurityException se ) {
System.out.println("Error SecurityException: "+se );
catch(Exception e){
System.out.println("Error Exception1: "+e );
System.out.println("Upload to server completed!!!");
}catch(Exception e){

System.out.println("Error Exception: "+e);
if(reader != null)
if(ftp != null)
reader= null;
ftp= null;
tmp = null;
Inet = null;
Dirk Schreckmann
Posts: 7023
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Perhaps a thread in your app isn't ending and/or releasing a file as you're hoping it will. I don't know. But the folks over in the Sockets and Internet Protocols forum, just might have an idea. So, I'm moving this thread...
[ December 05, 2003: Message edited by: Dirk Schreckmann ]
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