diff --git a/w2 b/w2
deleted file mode 160000
index fd45640..0000000
--- a/w2
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit fd456402449e69bf3e19b4065596e40001045371
diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
new file mode 100644
index 0000000..f0d23d6
--- /dev/null
+++ b/w2/DataCleaner.java
@@ -0,0 +1,34 @@
+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，按规则处理数据
+        for (int num : sensorData) {
+            // 规则3：致命错误，遇到999直接终止流程
+            if (num == 999) {
+                System.out.println("致命错误：传感器掉线，终止处理");
+                break;
+            }
+            // 规则2：无效数据（0/负数/大于100且不是999），跳过并告警
+            if (num <= 0 || num > 100) {
+                System.out.println("警告：发现越界数据[" + num + "]，已跳过");
+                continue;
+            }
+            // 规则1：正常范围（1-100），计入总和与计数
+            validSum += num;
+            validCount++;
+        }
+
+        // 规则4：最终输出平均值
+        if (validCount > 0) {
+            // 避免整数除法陷阱：将总和转为double再计算
+            double average = (double) validSum / validCount;
+            System.out.printf("有效数据的平均值为：%.2f%n", average);
+        } else {
+            System.out.println("无有效数据");
+        }
+    }
+}
\ No newline at end of file