diff --git a/代码/workspace_robo4/plugins/dotnet/robocode.dotnet.installer/src/main/java/net/sf/robocode/installer/AutoExtract.java b/代码/workspace_robo4/plugins/dotnet/robocode.dotnet.installer/src/main/java/net/sf/robocode/installer/AutoExtract.java
index 5b90b49..b191f9b 100644
--- a/代码/workspace_robo4/plugins/dotnet/robocode.dotnet.installer/src/main/java/net/sf/robocode/installer/AutoExtract.java
+++ b/代码/workspace_robo4/plugins/dotnet/robocode.dotnet.installer/src/main/java/net/sf/robocode/installer/AutoExtract.java
@@ -45,8 +45,8 @@ public class AutoExtract implements ActionListener {
 		} catch (IOException e) {
 			return true;
 		}finally{
-            extractJar.close();
-        }
+			extractJar.close();
+		}
 		if (is == null) {
 			return true;
 		}