looping on files ordered by file name

[Nesrin aboud]

Hi there ,

I scan several papers and give them a name of 0.jpg, 1.jpg, ordered by numbers
and then add them to a pdf file by the order of their names ,
sometimes the created pics bypass a number such as 0.jpg, 1.jpg, 3.jpg, 4.jpg
2.jpg in examples was lost
so when looping on it error appear before completing the addition of all pics to the pdf

can any body help me check on the next number before adding it to the pdf

I use iText.jar for creating the pdf

// to create the pdf file that containe all scanned files

	public void createDocument(String folderPath, int numberOfImages) {
		Document document = new Document();
		try {

			// step 2:
			// we create a writer
			// that listens to the document
			// and directs a PDF-stream to a file

			PdfWriter.getInstance(document, new FileOutputStream(folderPath));
			// step 3: we open the document
			document.open();
			// step 4: we add a paragraph to the document
			// document.add(new Paragraph("foxdog.jpg"));

			for (int i = 0; i < numberOfImages; i++) {

				Image img = Image.getInstance(folderPath + i + ".jpg");
				if (new File(folderPath + i + ".jpg").exists()) {
					// need to set the size !!!!!
					img.scalePercent(50, 50);
					// add the image to the pdf
					document.add(img);
				} else {
					System.out.println("image flow is not well done");
				}
			}// end for loop

		} catch (DocumentException de) {
			System.err.println(de.getMessage());
		} catch (IOException ioe) {
			System.err.println(ioe.getMessage());
		} finally {

		}    

also I would like to know how to loop on the files ordered by lastModification() date

[Wouter Oet]

Hope that this helps

class Test 
{
	public static void main(String... args){
		File currentDir = new File(".");
		File[] listOfFiles = currentDir.listFiles();
		
		for(File file: listOfFiles)
			System.out.println(new Date(file.lastModified()));
			
		Arrays.sort(listOfFiles, new LastModifiedComparator());
		System.out.println();
		
		for(File file: listOfFiles)
			System.out.println(new Date(file.lastModified()));
	}
}

class LastModifiedComparator implements Comparator<File>
{
	public int compare(File f1, File f2)
	{
		return new Date(f1.lastModified()).compareTo(new Date(f2.lastModified()));
	}
}    

[Nesrin aboud]

thank you very much, it helped a lot