Reading only Image files from a directory
i am wanting to be able to read a directory but only obtain the Image files (ie, gif, jpeg, tiff, png etc) and ignore all other type of files.
i have made a custom ImageFIlter class which extends FileFilter which works for adding a photo singly, as only image files are shown in the JFileChooser. however i am wanting to add a folder of photos at once.
here is the code so far:
File dir;
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
//Handle open button action.
int returnVal = fc.showOpenDialog(MainAppGUI.this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
dir = fc.getSelectedFile();
if (dir.isDirectory()) {
File[] files = dir.listFiles(new FileFilter());
for (int i = 0; i < files.length; i++) {
if (files.isFile()) {
try {
Photo PhotoAdded = workingCollection.addManyPhotos(files[i], canvas.getChangedMaxDim());
//need to also add it to the relevant vectors, ie
//for mouse over operations, or photos added after
//save.
if(!workingCollection.isDuplicate()){
photosToCheck.add(photoAdded);
canvas.addToGrid(photoAdded);
photosAddedAfterLoad.add(photoAdded);
canvas.repaint();
else{
//do nothing as it is already in the vectors.
} catch (Exception er) {
// Do nothing. Bad mp3, don't add.
// recurse through directories
else {
} else {
try {
throw new IOException(
"Error loading files from a directory: "
+ dir.getAbsolutePath() + " is not a "
+ "directory");
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
any ideas?
it shouldnt be new FileFilter() there, it should be new ImageFilter() but it gives a compilation error saying i cannot apply that parameter to the listFiles() method in the File class
Similar Messages
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Reading only Image Files from a Directory and ignoring the rest
i am wanting to be able to read a directory but only obtain the Image files (ie, gif, jpeg, tiff, png etc) and ignore all other type of files.
i have made a custom ImageFIlter class which extends FileFilter which works for adding a photo singly, as only image files are shown in the JFileChooser. however i am wanting to add a folder of photos at once.
here is the code so far:
File dir;
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
//Handle open button action.
int returnVal = fc.showOpenDialog(MainAppGUI.this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
dir = fc.getSelectedFile();
if (dir.isDirectory()) {
File[] files = dir.listFiles(new ImageFilter());
for (int i = 0; i < files.length; i++) {
if (files.isFile()) {
try {
Photo PhotoAdded = workingCollection.addManyPhotos(files[i], canvas.getChangedMaxDim());
//need to also add it to the relevant vectors, ie
//for mouse over operations, or photos added after
//save.
if(!workingCollection.isDuplicate()){
photosToCheck.add(photoAdded);
canvas.addToGrid(photoAdded);
photosAddedAfterLoad.add(photoAdded);
canvas.repaint();
else{
//do nothing as it is already in the vectors.
} catch (Exception er) {
// Do nothing. Bad mp3, don't add.
// recurse through directories
else {
} else {
try {
throw new IOException(
"Error loading files from a directory: "
+ dir.getAbsolutePath() + " is not a "
+ "directory");
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
any ideas?I'm confused.
You already ARE using a FileFilter to only pick up image files. Whats the problem?
If you need to recurse directories you need to change your code only a little.
Write your method
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
//Handle open button action.
int returnVal = fc.showOpenDialog(MainAppGUI.this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
dir = fc.getSelectedFile();
if (dir.isDirectory()) {
scanDirectory(dir);
else{
// not a directory
public void scanDirectoryForPhotos(File directory){
// taking your code
if (dir.isDirectory()) {
File[] files = dir.listFiles(new ImageFilter());
for (int i = 0; i < files.length; i++) {
if (files.isFile()) {
// details deleted
// recurse through directories
else {
scanDirectory(files[i]);
Your exception handling is a little strange. You throw an exception only to catch it immediately to print a stack trace? Not exactly the most common handling I've seen. You should probably just throw the exception and let the next level down handle it.
Cheers,
evnafets -
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Hello all,
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How to read all the files in the directory
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at org.apache.poi.hssf.record.Record.fillFields(Record.java:90)
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... 15 more
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I have read 118 files from a directory using the list.vi. Each file has 2 cols with 2088rows. Now I have the data in a 2 D array with 2cols and 246384rows (118files * 2088rows). However I want to put each file in the same array but each file in separate columns. then I would have 236 columns (2cols for each of the 118 files) by 2088 rows. thank you very much in advance.
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S.
// it takes almost no time to rate an answer
Attachments:
read_files_updated.vi 81 KB
Num_Lines_in_File.vi 62 KB -
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