diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
new file mode 100644
index 0000000..bc31df9
--- /dev/null
+++ b/w2/DataCleaner.java
@@ -0,0 +1,28 @@
+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
+        for (int i = 0; i < sensorData.length; i++) {
+            int CurrentData = sensorData[i];
+            if (CurrentData == 999 ) {
+                System.out.println("致命错误：传感器掉线，终止处理");
+                break;
+            }
+            if (CurrentData >= 1 && CurrentData <= 100) {
+                validSum += CurrentData;
+                validCount++;
+            } else {
+                System.out.println("警告：发现越界数据 "+CurrentData+"，已跳过");
+                continue;
+            }
+        }
+        if (validSum > 0) {
+            double averagevalidSum = (double) validSum / validCount;
+            System.out.println(averagevalidSum);
+        } else {
+            System.out.println("无有效数据");
+        }
+    }
+}
\ No newline at end of file