//<editor-fold defaultstate="collapsed" desc="Import & Export [Ivo, ALLES]">
private void b_mapImportMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b_mapImportMouseClicked
// TODO add your handling code here: IMPORT MAP
//Chooser = "Öffnen" Dialog
JFileChooser chooser = new JFileChooser(System.getProperty("user.home") + "/Documents/Schule/Informatik/Lernleistung");
FileNameExtensionFilter plainFilter = new FileNameExtensionFilter(
"Karte / Simluation: .map, .sim", "map", "sim");
chooser.removeChoosableFileFilter(chooser.getAcceptAllFileFilter());
chooser.setFileFilter(plainFilter);
chooser.setDialogTitle("Karte / Simulation öffnen");
if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {