diff --git a/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java b/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java
index 8844f9c..e5e0edd 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java
@@ -2,7 +2,7 @@
 
 import java.util.ArrayList;
 
-public class PlayListManager {
+public class PlayListManager{
     int index = 0;
     ArrayList<VoiceMemo> playlist = new ArrayList<>();
     ArrayList<VoiceMemo> unplayedlist = new ArrayList<>();
@@ -32,20 +32,17 @@
         }
         return unplayedlist;
     }
+
     //次のvoicememoに移動する
-    public ArrayList<VoiceMemo> next(){
+    public void next() {
         index++;
-
-
-        return unplayedlist;
     }
 
-    public void setIndex(int index) {
+    public void setIndex(){
         this.index = index;
     }
 
     public int getIndex() {
         return index;
     }
-
 }