Java Utililty Methods JFileChooser

return getOpenFile(name, currentDirectory, null);

JFileChooser chooser = getChooser(title);
int result = chooser.showOpenDialog(null);
if (result == JFileChooser.APPROVE_OPTION) {
    File file = chooser.getSelectedFile();
    System.out.println("User chose file " + file.getAbsolutePath());
    if (!file.exists()) {
        showMessage("File " + file.getName() + " doesn't exist, aborting");
        return null;
...

JFileChooser fc = createFileChooser(true, startName, saving);
final String finalExtension = extension;
final String finalDescription = description;
if (extension != null && extension.length() > 0) {
    FileFilter ff = new FileFilter() {
        public boolean accept(File f) {
            return f.isDirectory() || f.getName().toLowerCase().endsWith(finalExtension);
        public String getDescription() {
            return finalDescription;
    };
    fc.setFileFilter(ff);
int returnVal = -1;
if (saving) {
    returnVal = fc.showSaveDialog(null);
} else {
    returnVal = fc.showOpenDialog(null);
if (returnVal == JFileChooser.APPROVE_OPTION) {
    if (fc.getSelectedFile().getAbsolutePath().endsWith("." + finalExtension)) {
        return fc.getSelectedFile();
    } else {
        return new File(fc.getSelectedFile().getAbsolutePath() + "." + finalExtension);
} else {
    return null;

String name = defaultName;
if (defaultName == null)
    name = "data";
if (name.indexOf(".") == -1)
    name += "." + defaultExtension;
if (currentDirectory == null)
    currentDirectory = System.getProperty("user.dir");
return getSaveAsFile(name, currentDirectory);
...

File[] files = getFile(message, false, defaultFileOrDir, false, description, extensions);
if (files == null) {
    return null;
} else {
    return files[0];

Container c1 = (Container) chooser.getComponent(3);
JList list = null;
while (c1 != null) {
    final Container c = (Container) c1.getComponent(0);
    if (c instanceof JList) {
        list = (JList) c;
        break;
    c1 = c;
final Object[] entries = list.getSelectedValues();
final File[] files = new File[entries.length];
for (int k = 0; k < entries.length; k++) {
    if (entries[k] instanceof File) {
        files[k] = (File) entries[k];
return files;

Container c1 = (Container) chooser.getComponent(3);
JList list = null;
while (c1 != null) {
    Container c = (Container) c1.getComponent(0);
    if (c instanceof JList) {
        list = (JList) c;
        break;
    c1 = c;
Object[] entries = list.getSelectedValues();
File[] files = new File[entries.length];
for (int k = 0; k < entries.length; k++) {
    if (entries[k] instanceof File)
        files[k] = (File) entries[k];
return files;

File file = c.getSelectedFile();
if (c.getFileFilter() instanceof FileNameExtensionFilter) {
    String[] exts = ((FileNameExtensionFilter) c.getFileFilter()).getExtensions();
    String nameLower = file.getName().toLowerCase();
    for (String ext : exts) { 
        if (nameLower.endsWith('.' + ext.toLowerCase())) {
            return file; 
    file = new File(file.toString() + '.' + exts[0]);
return file;

File file = c.getSelectedFile();
if (c.getFileFilter() instanceof FileNameExtensionFilter) {
    String[] exts = ((FileNameExtensionFilter) c.getFileFilter()).getExtensions();
    String nameLower = file.getName().toLowerCase();
    for (String ext : exts) { 
        if (nameLower.endsWith('.' + ext.toLowerCase())) {
            return file; 
    file = new File(file.toString() + '.' + exts[0]);
return file;

JFileChooser jfc = new JFileChooser();
jfc.setFileSelectionMode(mode);
jfc.setFileHidingEnabled(true);
jfc.setAcceptAllFileFilterUsed(true);
if (filters != null) {
    for (int i = 0; i < filters.length; i++) {
        jfc.addChoosableFileFilter(filters[i]);
    if (filters.length >= 1) {
        jfc.setFileFilter(filters[0]);
int result = jfc.showOpenDialog(owner);
if (result == JFileChooser.APPROVE_OPTION) {
    return jfc.getSelectedFile();
return null;