diff --git a/代码/workspace_robo4/robocode.roborumble/src/main/java/net/sf/robocode/roborumble/netengine/UpdateRatingFiles.java b/代码/workspace_robo4/robocode.roborumble/src/main/java/net/sf/robocode/roborumble/netengine/UpdateRatingFiles.java
index ea9c212..bae6525 100644
--- a/代码/workspace_robo4/robocode.roborumble/src/main/java/net/sf/robocode/roborumble/netengine/UpdateRatingFiles.java
+++ b/代码/workspace_robo4/robocode.roborumble/src/main/java/net/sf/robocode/roborumble/netengine/UpdateRatingFiles.java
@@ -73,6 +73,7 @@ public class UpdateRatingFiles {
 			while ((record = br.readLine()) != null) {
 				battles.add(record);
 			}
+			fr.close();
 		} catch (IOException e) {
 			System.out.println("Can't open # battles file ... Aborting # battles update");
 			return false;
diff --git a/代码/workspace_robo4/robocode.ui/src/main/java/net/sf/robocode/ui/dialog/PreferencesSoundOptionsTab.java b/代码/workspace_robo4/robocode.ui/src/main/java/net/sf/robocode/ui/dialog/PreferencesSoundOptionsTab.java
index 9dc4e61..1653e10 100644
--- a/代码/workspace_robo4/robocode.ui/src/main/java/net/sf/robocode/ui/dialog/PreferencesSoundOptionsTab.java
+++ b/代码/workspace_robo4/robocode.ui/src/main/java/net/sf/robocode/ui/dialog/PreferencesSoundOptionsTab.java
@@ -228,7 +228,7 @@ public class PreferencesSoundOptionsTab extends WizardPanel {
 				if (AudioSystem.getMixer(mi).getSourceLineInfo(clipLineInfo).length > 0) {
 					mixers.add(mi);
 				}
-                mi.close();
+				AudioSystem.getMixer(mi).close();
 			}
 
 			mixerComboBox = new JComboBox(mixers);
@@ -319,7 +319,7 @@ public class PreferencesSoundOptionsTab extends WizardPanel {
 				getMixerComboBox().setSelectedItem(mi);
 				break;
 			}
-            mi.close();
+			AudioSystem.getMixer(mi).close();
 		}
 	}