Java file delete Is not Deleting Specified File

Question

This is currently what I have to delete the file but it s not working  I thought it may be permission problems or something but it wasn t  The file that I am testing with is empty and exists  so not sure why it doesn t delete it   UserInput prompt  Enter name of file to delete    String name   UserInput readString    File file   new File    Files      name     txt    file delete      Any help would be GREATLY appreciated   I now have   File file   new File catName     txt    String path   file getCanonicalPath    File filePath   new File path   filePath delete      To try and find the correct path at run time so that if the program is transferred to a different computer it will still find the file

User · Answer

As other answers indicate  on Windows you cannot delete a file that is open  However one other thing that can stop a file from being deleted on Windows is if it is is mmap d to a MappedByteBuffer  or DirectByteBuffer  -- if so  the file cannot be deleted until the byte buffer is garbage collected  There is some relatively safe code for forcibly closing  cleaning  a DirectByteBuffer before it is garbage collected here  https   github com classgraph classgraph blob master src main java nonapi io github classgraph utils FileUtils java L606  After cleaning the ByteBuffer  you can delete the file  However  make sure you never use the ByteBuffer again after cleaning it  or the JVM will crash

User · Answer

If you want to delete file first close all the connections and streams  after that delete the file

User · Answer

The problem could also be due to any output streams that you have forgotten to close  In my case I was working with the file before the file being deleted  However at one place in the file operations  I had forgotten to close an output stream that I used to write to the file that was attempted to delete later

User · Answer

In my case I was processing a set of jar files contained in a directory   After I processed them I tried to delete them from that directory  but they wouldn t delete   I was using JarFile to process them and the problem was that I forgot to close the JarFile when I was done

User · Answer

I suspect that the problem is that the path is incorrect   Try this   UserInput prompt  Enter name of file to delete    String name   UserInput readString    File file   new File    Files      name     txt    if  file exists          file delete      else       System err println           I cannot find      file            file getAbsolutePath

User · Answer

Try closing all the FileOutputStream FileInputStream you ve opened earlier in other methods  then try deleting  worked like a charm

User · Answer

In my case it was the close   that was not executing due to unhandled exception    void method   throws Exception       FileInputStream fis   new FileInputStream fileName       parse fis       fis close        Assume exception is being thrown on the parse    which is not handled in this method and therefore the file is not closed  down the road  the file is being deleted  and that delete statement fails  and do not delete   So  instead I had the code like this  then it worked         try           parse fis             catch  Exception ex            fis close            throw ex          so basic Java  which sometimes we overlook

User · Answer

Problem is that check weather you have closed all the streams or not if opened close the streams and delete rename  etc the file this is worked for me

User · Answer

Since the directory is not empty  file delete   returns false  always  I used  file deleteRecursively    which is available in Kotlin and would delete the completely directly and return the boolean response just as file delete   does

User · Answer

I got the same problem  then realized that my directory was not empty  I found the solution in another thread  not able to delete the directory through Java         Force deletion of directory     param path     return     static public boolean deleteDirectory File path        if  path exists              File   files   path listFiles            for  int i   0  i  lt  files length  i                  if  files i  isDirectory                      deleteDirectory files i                  else                   files i  delete                                      return  path delete

User · Answer

Be sure to find out your current working directory  and write your filepath relative to it   This code   File here   new File       System out println here getAbsolutePath           will print out that directory   Also  unrelated to your question  try to use File separator to remain OS-independent  Backslashes work only on Windows

User · Answer

If still not working you can call garbage collector to close the file and free up memory   System gc    if new File      tmp txt   delete         System out println  OK        Don t forget to close that file  if any previous opening using code snippet fio close   I tested in Java 1 8  works well

User · Answer

I made the mistake of opening a BufferedReader like   File f   new File  somefile txt    BufferedReader br   new BufferedReader new FileReader f         and of course I could not execute the f delete   because I wrapped the  FileReader instead of instantiating its own variable where I could explicitly close it  Duh     Once I coded     File f   new File  somefile txt    FileReader fread   new FileReader f   BufferedReader br   new BufferedReader fread     I could issue a br close    br null  fread close    fread null  and the f delete   worked fine

[java] Java 'file.delete()' Is not Deleting Specified File

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