public String getDescription() {
return "PNG Files (*.png)";
}
};
fileChooser.addChoosableFileFilter(pngFilter);
fileChooser.setFileFilter(pngFilter);
int returnValue = fileChooser.showSaveDialog(dialog);
if (returnValue == JFileChooser.APPROVE_OPTION) {
File pngFile = fileChooser.getSelectedFile();