diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
new file mode 100644
index 0000000..cc7d75c
--- /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;   // 有效数据总和
+        int validCount = 0; // 有效数据个数
+
+        // 请在此处编写你的流程控制代码
+        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 && value != 999)) {
+                System.out.println("警告：发现越界数据 [" + value + "]，已跳过");
+                continue;
+            }
+
+            // 1~100 之间的有效数据
+            validSum += value;
+            validCount++;
+        }
+
+        if (validCount > 0) {
+            double avg = (double) validSum / validCount; // 强转 double，避免整数除法
+            System.out.println("有效数据平均值：" + avg);
+        } else {
+            System.out.println("无有效数据");
+        }
+    }
+}
diff --git a/w2/w2 java运行结果.png b/w2/w2 java运行结果.png
new file mode 100644
index 0000000..3532e22
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