private void button_openActionPerformed(ActionEvent evt)
{
JFileChooser fc = new JFileChooser();
fc.removeChoosableFileFilter(fc.getChoosableFileFilters()[0]);
fc.addChoosableFileFilter(new EasySMFileFilter());
int returnVal = fc.showOpenDialog(this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
File file = fc.getSelectedFile();