diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
new file mode 100644
index 0000000..1f02505
--- /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 value : sensorData) {
+            if (value == 999) {
+                System.out.println("致命错误：传感器掉线，终止处理");
+                break;
+            }
+            if (value >= 1 && value <= 100) {
+                validSum += value;
+                validCount++;
+            } else {
+                System.out.println("警告：发现越界数据 [" + value + "]，已跳过");
+                continue;
+            }
+        }
+        if (validCount > 0) {
+            double average = (double) validSum / validCount;
+            System.out.println("有效数据的平均值为：" + average);
+        } else {
+            System.out.println("无有效数据");
+        }
+    }
+}
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