JComboBoxFixture comboBox = getFileFormatComboBox();
final int N = comboBox.contents().length;
for (int i = 0; i < N; i++) {
JFileImageChooser.FormatFilter filter =
(JFileImageChooser.FormatFilter) comboBox.component().getItemAt(i);
String suffix = filter.getDefaultSuffix();
if (suffix.startsWith(".")) {
suffix = suffix.substring(1);
}