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problem in RunTime.exec

gudla Dathathreya Reddy

Joined: May 05, 2004
Posts: 15
Hi friends,
I am getting a problem in my application. I will state the complete problem in detail. I have to transfer 3 files from one NT machine to unix machine some where kept in net work, I used an ftp in 'Process p = getRunTime().exec("ftp -i -s:ftp.txt")'. In ftp.txt file I have given the necessary things for ftp to unix machine. The files are transfering into the unix box. When I to the process for the 2nd time I have to check whether the file are exists in the unix box, then only transfer the files. Now, again I am doing ftp bring the files from the unix box to NT machines using 'Process p = getRunTime().exec("ftp -i -s:ftp1.txt")' where ftp1 contains all the necessary things for ftp to unix machine . Now I am checking for the files available in the NT machine using boolean=(new File(filename)).exists(), Fine out of 3 files, 2 file shows the return type as 'true' and one file is showing 'false', even the same happens if I delete the 3 files after checking, out of 3 files, 2 file shows the return type as 'true' and one file is showing 'false'. I went to the folder where I am bring files from and removing the files manually, one file is showing share violation, one process is using the file . I am unable to resolve this problem, will this code what I write is acceptable if not suggest any other code. I have sending all the snippets of the programs. I am doing this in the development environment like this. My production environment is totally both are unix machines.

1. ftp to transfer files.(tranfer.txt)called in java code down

cd /tmp
put d:/dathu/CSV/bssfa932.txt
put d:/dathu/CSV/bssfa933.txt
put d:/dathu/CSV/bssfa936.txt

2. ftp to get the files(get.txt)used in java code down

cd /tmp
lcd d:/dathu/hold
get bssfa932.txt
get bssfa933.txt
get bssfa936.txt

3. java code snippet to getfiles
Process p = Runtime.getRuntime().exec("ftp -i -s:get.txt");

4. java code to check the files exist

boolean filestatus=moCreatFlatFilerobj.isFileExists();

public boolean isFileExists(){
boolean isfileexisting=false;
boolean blnordhead = (new File(file1 with path)).exists();
boolean blnordlines = (new File(file2 with path)).exists();
boolean blnaccount = (new File(file3 with path)).exists();
if(blnordhead && blnordlines && blnaccount){
return isfileexisting;

5. java code to delete files

public void deleteFiles(){
boolean header= (new File(file1 with path)).delete();
boolean line =(new File(file2 with path)).delete();
boolean account=(new File(file3 with path)).delete();

6. java code to tranfer files.
p = Runtime.getRuntime().exec("ftp -i -s:transfer.txt");

Please help me...
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