Htykuut

I am writing new files into a directory on daily basis.

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

Before creating new files, I want to delete the previously added files existing in the folder. And the previous files will not override with new ones because the file names are different. How can I achieve this?

You can delete all existing files from the given directory using this one liner code,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

So, just place this line of code before your BufferedWriter line, like this,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

The following code can be helpful.

(This is just the idea of what you can do and I'm not sure about bugs.)

public class rename 

{ 

    public static void main(String argv) throws IOException 

    { 

         // Path of folder where files are located 

         String folder_path = 

           "C:\Users\Anannya Uberoi\Desktop\myfolder"; 



         // creating new folder 

         File myfolder = new File(folder_path); 



         File file_array = myfolder.listFiles(); 

         for (int i = 0; i < file_array.length; i++) 

         { 



            if (file_array[i].isFile()) 

            { 



                File myfile = new File(folder_path + 

                     "\" + file_array[i].getName()); 

                myfile.delete(); 

            } 

        } 

    } 

}