btnStart = new JButton(Messages.MSGCalcStart.toString());
btnStart.addActionListener(e -> {
CompletableFuture.runAsync(() -> {
+ if(selectedSongsList.isEmpty()) {
+ logger.warn("User has not started playing yet.");
+ return;
+ }
Random random = new Random(System.currentTimeMillis());
toolIntegrateList = new ArrayList<>();
StringBuilder paneBuilder = new StringBuilder();