diff --git a/w2/DataCleaner.class b/w2/DataCleaner.class
new file mode 100644
index 0000000..6e347c1
Binary files /dev/null and b/w2/DataCleaner.class differ
diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
index 6e6e0cd..7687cc1 100644
--- a/w2/DataCleaner.java
+++ b/w2/DataCleaner.java
@@ -1,33 +1,33 @@
-public class DataCleaner {
-    public static void main(String[] args) {
-        int[] sensorData = {85, -5, 92, 0, 105, 999, 88, 76};
-        
-        int validSum = 0;   // 有效数据总和
-        int validCount = 0; // 有效数据个数
-        
-        // 遍历数组
-        for (int value : sensorData) {
-            if (value == 999) {
-                System.out.println("致命错误：传感器掉线，终止处理");
-                break;
-            }
-            
-            if (value <= 0 || value > 100) {
-                System.out.println("警告：发现越界数据 " + value + "，已跳过");
-                continue;
-            }
-            
-            // 有效数据（1到100之间）
-            validSum += value;
-            validCount++;
-        }
-        
-        // 输出结果
-        if (validCount > 0) {
-            double average = (double) validSum / validCount;
-            System.out.println("有效数据平均值为：" + average);
-        } else {
-            System.out.println("无有效数据");
-        }
-    }
+public class DataCleaner {
+    public static void main(String[] args) {
+        int[] sensorData = {85, -5, 92, 0, 105, 999, 88, 76};
+        
+        int validSum = 0;   // 有效数据总和
+        int validCount = 0; // 有效数据个数
+        
+        // 遍历数组
+        for (int value : sensorData) {
+            if (value == 999) {
+                System.out.println("致命错误：传感器掉线，终止处理");
+                break;
+            }
+            
+            if (value <= 0 || value > 100) {
+                System.out.println("警告：发现越界数据 " + value + "，已跳过");
+                continue;
+            }
+            
+            // 有效数据（1到100之间）
+            validSum += value;
+            validCount++;
+        }
+        
+        // 输出结果
+        if (validCount > 0) {
+            double average = (double) validSum / validCount;
+            System.out.println("有效数据平均值为：" + average);
+        } else {
+            System.out.println("无有效数据");
+        }
+    }
 }
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