File Name reader problem

Skyfreak12345

hi,

I am trying to make a data store and I want to ask the user the question if he wants to use an existing file or he wants to create a new one, for that I have to read the filenames and print him the existing ones, and I don't know how to do that, I already had a look at another contribution but that didn't help me (I am not the best programmer)

Skyfreak12345

import java.io.File;

File folder; String [] filenames;

void setup() { java.io.File folder = new java.io.File(dataPath(" ")); }

void draw() { filenames = folder.list(); println(filenames.length + ".properties.ser");

for(int i = 0; i <= filenames.length; i++) { println(filenames[i]); } }

akenaton

@Skyfreak== try this (but there are a lot of other ways); getName() is (for me) the solution::

    import java.io.File;

    String cheminData; //path towards folder
    String fichiers; // var for the names of the files


    void setup(){
      size(200,200);

      cheminData = dataPath("");
      getFilesFromFolder(cheminData);

    }

    public void getFilesFromFolder(String folderPath) {
      int nbre = 0; // number of files inside the folder

        File dir = new File(folderPath); // the directory
        File[] files = dir.listFiles(); // list for the files inside

        String[] resultat = new String[files.length];//useful if you want to reuse


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

       if (files[i].isFile()) 
       {
       fichiers = files[i].getName();

       resultat[i] = fichiers;
       System.out.println(fichiers);
          }
      }
      nbre = (files.length);
      System.out.println(nbre);

      }

Skyfreak12345

I'll try it out thanks ;-)

Skyfreak12345

Skyfreak12345

okay, got a better idea but thanks

akenaton

are you sure that your files are in the data folder of your sketch; i have tested my code & it runs...

akenaton

ah, i see , error with copy & paste, i forgotten string[] resultat!!!! so===

import java.io.File;

String cheminData;
String fichiers;
String[] resultat;// forgotten!!!!


void setup(){
  size(200,200);

  cheminData = dataPath("");
  getFilesFromFolder(cheminData);

}

public void getFilesFromFolder(String folderPath) {
  int nbre = 0;
    File dir = new File(folderPath);
    File[] files = dir.listFiles();
    resultat = new String[files.length];


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

   if (files[i].isFile()) 
   {
   fichiers = files[i].getName();
   resultat[i] = fichiers;
   System.out.println(fichiers);
      }
  }
  nbre = (files.length);

  println(nbre);

  }

GoToLoop

• We can directly get a File instance from "/data/" subfolder using dataFile() in place of dataPath()!
• And File doesn't need to import. It's already done by Processing! :P

String[] archives;

void setup() {
  archives = getFilesFromDataFolder();
  printArray(archives);
  exit();
}

String[] getFilesFromDataFolder() {
  return dataFile("").list();
}

P.S.: If you also wanna filter by file extensions, pass an instance of FilenameFilter as argument for list():

• http://forum.processing.org/two/discussions/tagged/filenamefilter
• http://docs.oracle.com/javase/8/docs/api/java/io/File.html#list-java.io.FilenameFilter-
• http://docs.oracle.com/javase/8/docs/api/java/io/FilenameFilter.html

akenaton

@goToLoop== - thanks! i always imported File without thinking! - i dont know the printArray() method you use (kind of ArraysToString() i think?) - & cannot find it in reference

GoToLoop

https://processing.org/reference/printArray_.html

akenaton

@goToLoop== ok; added in2.0: i used the 1.5.1 reference and found nothing of course best wishes!

GoToLoop

P2 added printArray() b/c println() somehow lost its original way of displaying arrays.
In other words, P2's printArray() behaves exactly as P1's println() for arrays! :-B

PhiLho

See How to format code and text, avoid posting code in screenshots, they are barely readable, cannot be searched nor copy & pasted in the PDE..