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Index › Programming Questions & Help › Programs › How to get the number of files in a folder

Andre_V._P. YaBB Newbies Offline Posts: 14	How to get the number of files in a folder May 27th, 2008, 7:03pm   Hi, I'm having a lot of trouble trying to solve a problem: I need to know how many jpg files are in my sketch data folder. Is there a way to do that ? A function ? a Library ? Can anyone help me ? Thanks !

antiplastik YaBB Moderator Offline Posts: 699 France

Re: How to get the number of files in a folder Reply #1 - May 27th, 2008, 8:38pm   java.io.File provides a lot of useful methods for such issues : Quote: // have a look in the data folder java.io.File folder = new java.io.File(dataPath("")); // this is the filter (returns true if file's extension is .jpg) java.io.FilenameFilter jpgFilter = new java.io.FilenameFilter() {  boolean accept(File dir, String name) {    return name.toLowerCase().endsWith(".jpg");  } }; // list the files in the data folder String[] filenames = folder.list(jpgFilter); // get the number of jpg files println(filenames.length + " jpg files in specified directory"); // print the filenames for (int i = 0; i < filenames.length; i++) println(filenames[i]);

Andre_V._P. YaBB Newbies Offline Posts: 14	Re: How to get the number of files in a folder Reply #2 - May 28th, 2008, 2:25pm   thanks, I'll try that.

REAS YaBB Moderator Offline Posts: 712 CA	Re: How to get the number of files in a folder Reply #3 - Jun 13th, 2008, 3:27am   antiplastik, can you add this to hacks? http://www.processing.org/hacks/

antiplastik YaBB Moderator Offline Posts: 699 France	Re: How to get the number of files in a folder Reply #4 - Jun 13th, 2008, 9:59am   Of course, just added it in Using built-in Java classes section: http://processing.org/hacks/doku.php?id=hacks:listing-files