strange characters at the end of directory in android

Question

I have an issue with directory creation in Android. I use this code to create a directory if doesn't exist and then create a file under it.

dir=new File(Constants.TASK_DIRECTORY);
if(!dir.exists())
dir.mkdirs();
file=new File(dir, FILENAME);   
file.createNewFile();

Sometimes it works fine, but sometimes when I check the folder from adb shell I see directories ending with 3 or more "|" characters. My directory name format is "Abc_123-10.10.2000 ". What I see sometimes is exactly the same, but sometimes "Abc_123-10.10.2000|||" . I need to access the files under directories with the help of their name format but this situation makes it hard, any help would be appreciated.

I set TASK directory in this code

Constants.TASK_DIRECTORY=getFilesDir()+"/"+app.getUserName()+"-"+dt;

app is my application object

Edit: Solved this problem, it was because TASK_DIRECTORY was not properly set and contains "|" characters. But how can this be possible?

Answer 1

File can't store or save with some special character as below.

      /\:?*"<>|