diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
new file mode 100644
index 0000000..a82c065
--- /dev/null
+++ b/w2/DataCleaner.java
@@ -0,0 +1,32 @@
+public class DataCleaner {
+    public static void main(String[] args) {
+        int[] sensorData = {85, -5, 92, 0, 105, 999, 88, 76};
+
+        int validSum = 0;
+        int validCount = 0;
+
+        for (int i = 0; i < sensorData.length; i++) {
+            int value = sensorData[i];
+
+            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;
+            }
+
+            validSum += value;
+            validCount++;
+        }
+
+        if (validCount > 0) {
+            double average = (double) validSum / validCount;
+            System.out.println("有效数据平均值：" + average);
+        } else {
+            System.out.println("无有效数据");
+        }
+    }
+}