From: hizumiaoba <56146205+hizumiaoba@users.noreply.github.com>
Date: Sat, 16 Apr 2022 02:31:05 +0000 (+0900)
Subject: fix 44396
X-Git-Url: http://git.osdn.net/view?p=delesterandomselector%2FDelesteRandomSelector.git;a=commitdiff_plain;h=c8a8b1a3665384eca624f900f2610ca0ab32c7c4;ds=sidebyside

fix 44396
---

diff --git a/src/com/ranfa/main/DelesteRandomSelector.java b/src/com/ranfa/main/DelesteRandomSelector.java
index 3401acd..ab75dc6 100644
--- a/src/com/ranfa/main/DelesteRandomSelector.java
+++ b/src/com/ranfa/main/DelesteRandomSelector.java
@@ -477,6 +477,10 @@ public class DelesteRandomSelector extends JFrame {
 	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();