Display of files of a particular extension like .txt or .csv in JFileChooser can be done using the FileNameExtensionFilter in Java as follows: fileChooser = new JFileChooser(); fileChooser.setSelectedFile(null); FileNameExtensionFilter fileFilter = new FileNameExtensionFilter("CSV Files", "csv"); fileChooser.setFileFilter(fileFilter); fileChooser.showOpenDialog(frame);