How to partially created files in java

In my program i am monitering a folder to identify a particular file is created.
this file created by another program. i don't have any control to that.
i am using a while loop to moniter the file folder.
i am using following codeing for that.
while ((! found)&&(loopcount<99999)){
files = file.listFiles(
new FileFilter() {
public boolean accept(File pathname) {
if (pathname.isFile() &&
pathname.getName().startsWith(awbNumber+"_") &&
pathname.getName().endsWith(".pdf")) {
return true;
return false;
problem is if the file is partially created also this code identifies the file is created.then the contents of the file are encoded. therefore sometimes the partially created file will be encoded. it doesnot prompt any exceptions.
how can i idntify the file is fully created or partially created.is there a way to read file mode that is if the file is in read mode or not.
i need to encode the fully created file.
please help me
thanks in advance

have you tried re-nameing the file? if the file is still open by the other program renaming will fail and thus you know to wait.

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