Deleting a file from disk

Hello,

I'm saving a file to disk using the following code. My question is how do I delete the file? I would have a delete
button, which when pressed would read the currently selected file from a combo box and delete the file from disk.



    // Open File
    public void save()
    {
        jFileChooser1.setVisible(true);
        if (jFileChooser1.showSaveDialog(this) == JFileChooser.APPROVE_OPTION)
        {
            save (jFileChooser1.getSelectedFile());
        }
    }
   
    private void save (File file)
    {
      try
      {
         // Write the objects stored in script vector to the specified file
         ObjectOutputStream Script = new ObjectOutputStream(new FileOutputStream(file));
         Script.writeObject(scriptVector);
         Script.flush();
         Script.close();
         scriptSelectComboBox.addItem(file.getName());
         // Display the status of the save file operation in jlblStatus
         jlblStatus.setText(file.getName()  + " Saved ");
      }
      catch (IOException ex)
      {
        jlblStatus.setText("Error saving " + file.getName());
      }
   }


Here is my delete button code:
   private void scriptDelScriptButtonActionPerformed(java.awt.event.ActionEvent evt)
    {
        if (scriptSelectComboBox.getSelectedIndex() != 0)
        {
           Object newItem = scriptSelectComboBox.getSelectedItem();
           scriptSelectComboBox.removeItem(newItem);
           jlblStatus.setText(newItem.toString()  + " Deleted ");
     // Need to add code here that will delete the file from disk

        }
    }
GoldStrikeAsked:
Who is Participating?
 
ramazanyichConnect With a Mentor Commented:
You should use File.delete() API call.
In you code first you should remember user selection as class member and then use it  then user clicks on delete button.

For example:
//define member
File curfile = null;

private void save (File file){
curfile = file;
....

        jlblStatus.setText(newItem.toString()  + " Deleted ");
     // Need to add code here that will delete the file from disk
       curfile.delete();
0
 
zzynxSoftware engineerCommented:
on a File object you can call the delete() function
0
 
zzynxConnect With a Mentor Software engineerCommented:
So I guess somehting like this should work:

// code that will delete the file from disk:
File f = new File((String)newItem);
f.delete();
0
Never miss a deadline with monday.com

The revolutionary project management tool is here!   Plan visually with a single glance and make sure your projects get done.

 
objectsConnect With a Mentor Commented:
you need to use delete() and check the return value to see if the file was actually deleted.

public void delete(File f)
{
   if (!f.delete())
   {
      jlblStatus.setText("failed to delete file " + f.getName());
   }
}

0
 
GoldStrikeAuthor Commented:
the delete is failing, when I look in the debugger, the value for f is
correct "d:\\optics\\system\\titan.script".

I'm thinking that it's trying to delete a directory, but since the directory is not empty it is failing.
Do I need to traverse through the files in the directory first until I find the file I need to delete?

thanks
0
 
zzynxSoftware engineerCommented:
>> thinking that it's trying to delete a directory
Is "d:\\optics\\system\\titan.script" a directory or is it a file?
If it's a file, it is trying to delete that file. But maybe there are OS reasons why it can't delete it.

>> Do I need to traverse through the files in the directory first until I find the file I need to delete?
Why should you if you have the file name (got from the file chooser)?
0
 
GoldStrikeAuthor Commented:
I;m deleting a file. I'm actually getting the file name from the combo box as follows.

    private void scriptDelScriptButtonActionPerformed(java.awt.event.ActionEvent evt)
    {
        if (scriptSelectComboBox.getSelectedIndex() != 0)
        {
           Object newItem = scriptSelectComboBox.getSelectedItem();
           File f = new File(fFileRef.getPath() + "//scripts//" + newItem.toString());
           delete(f, newItem);
        }
    }

    public void delete(File f, Object newItem)
   {
      if (!f.delete())
      {
         jlblStatus.setText("failed to delete file " + f.getName());
      }
      else
      {
         jlblStatus.setText(f.getName() + " Deleted ");
         scriptSelectComboBox.removeItem(newItem);
      }
   }
0
 
GoldStrikeAuthor Commented:
OK, the above posted code works.

thanks for all the reponses.
0
 
zzynxSoftware engineerCommented:
Your welcome.
Thanks for accepting.
0
 
objectsCommented:
Glad we could help :)
0
All Courses

From novice to tech pro — start learning today.