http://www.guj.com.br/java/23249-joption-portugues

Ok, cara, resolveu quase tudo, mas a barra de título do JFileChooser continua em inglês. Qual a propriedade da barra de titulo, alguém sabe?

Essas são todas as propriedades do JFileChooser:

# The text on the title bar (open dialog)

FileChooser.openDialogTitleText=Open

# The text on the title bar (save dialog)

FileChooser.saveDialogTitleText=Save

# The text for the label in front of the folder selection box (open dialog)

FileChooser.lookInLabelText=Look In:

# The text for the label in front of the folder selection box (save dialog)

FileChooser.saveInLabelText=Save In:

# The tooltip of the button for navigating to the parent folder

FileChooser.upFolderToolTipText=Up One Level

# The tooltip of the button for navigating to the home folder

FileChooser.homeFolderToolTipText=Desktop

# The tooltip of the button used to create a new folder

FileChooser.newFolderToolTipText=Create New Folder

# The tooltip of the button for switching to list view

FileChooser.listViewButtonToolTipText=List

# The tooltip of the button for switching to detailed view

FileChooser.detailsViewButtonToolTipText=Details

# The text placed on the header column displaying the file name in the detailed view

FileChooser.fileNameHeaderText=Name

# The text placed on the header column displaying the file size in the detailed view

FileChooser.fileSizeHeaderText=Size

# The text placed on the header column displaying the file type in the detailed view

FileChooser.fileTypeHeaderText=Type

# The text placed on the header column displaying the last modified date of the file in the detailed view

FileChooser.fileDateHeaderText=Date Modified

# The text placed on the header column displaying the file attributes in the detailed view

FileChooser.fileAttrHeaderText=Attributes

# The text of the label in front of the textfield containing the selected file name

FileChooser.fileNameLabelText=File Name:

# The text for the label in front of the filter selection box

FileChooser.filesOfTypeLabelText=Files of Type:

# The text on the button used to select the file on an open type dialog

FileChooser.openButtonText=Open

# The tooltip text for the button used to select the file on an open type dialog

FileChooser.openButtonToolTipText=Open selected file

# The text on the button used to select the file on a save type dialog

FileChooser.saveButtonText=Save

# The tooltip text for the button used to select the file on a save type dialog

FileChooser.saveButtonToolTipText=Save selected file

# The text on the button used to open a folder while browsing

FileChooser.directoryOpenButtonText=Save

# The tooltip text for the button used to open a folder while browsing

FileChooser.directoryOpenButtonToolTipText=Save selected file

# The text on the button used to cancel the file selection dialog

FileChooser.cancelButtonText=Cancel

# The tooltip text for the button used to cancel the file selection dialog

FileChooser.cancelButtonToolTipText=Abort file chooser dialog

FileChooser.updateButtonText=

FileChooser.updateButtonToolTipText=

FileChooser.helpButtonText=

FileChooser.helpButtonToolTipText=

# The error text to appear when an error occurs while creating a new folder

FileChooser.newFolderErrorText=Error creating new folder

# The description, to appear in the filter combobox, for the filter used in the file chooser to accept all the files.

FileChooser.acceptAllFileFilterText=All Files

# The button caption for confirmation in an option dialog

OptionPane.yesButtonText=Yes

# The button caption for denying an option dialog

OptionPane.noButtonText=No

# The button caption for aborting an option dialog

OptionPane.cancelButtonText=Cancel

# The text for the progress monitor

ProgressMonitor.progressText=Please wait

Ok, obrigado, mas agora, descobri que o menu de contexto do FileChooser continua em inglês. Mais alguma dica de onde eu posso achar as propriedades?