How to delete specific file from folder in JAVA, without deleting the folder itself?

I'm having a problem in deleting a specific file in a folder, This is what I want to happen:

I want to delete a file, having the file name of..

This is my code by the way:

try
{
    File f=new File("C://Generated Barcodes//"+file_copy.getText()+".png");//full path like c:/home/ri
    if(!f.exists())
    {
        JOptionPane.showMessageDialog(null, "Something Went Wrong!",
        " ", JOptionPane.ERROR_MESSAGE);
    }
    else
    {
        f.delete();
    }
} catch(Exception e) {
    e.printStackTrace();
}

can anyone help me out on how to do it.? It did not delete the file actually. And I guess, the delete() there, doesn't do anything. Your help is highly appreciated.