diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
new file mode 100644
index 0000000..fd1da1a
--- /dev/null
+++ b/w2/DataCleaner.java
@@ -0,0 +1,27 @@
+public class DataCleaner{
+	public static void main (String[] args) {
+		int[] sensorData ={85,-5,92,0,105,999,88,76};
+			int vaildSum=0;
+			int validCount=0;
+
+			for (int data : sensorData) {
+				if (data ==999) {
+					System.out.println("致命错误：传感器掉线，终止处理");
+					break;
+				}
+				if (data<=0 || data > 100) {
+					Syztem.out.println("警告：发现越界数据[" + data + "], 已跳过");
+					continue;
+				}
+				vaildSum +=data;
+				validCount++;
+			}
+			if (vaildCount > 0) {
+				double average = (double)
+validSum / vaildCount;
+				System.out.println("有效数据平均值：" + average);
+			} else {
+				System.out.println("无有效数据");
+			}
+		}
+	}
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