diff --git a/src/Stream8/StreamDemo.java b/src/Stream8/StreamDemo.java
new file mode 100644
index 0000000000000000000000000000000000000000..3824734e8c23114e74d393262887e19d255c5685
--- /dev/null
+++ b/src/Stream8/StreamDemo.java
@@ -0,0 +1,24 @@
+package Stream8;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * todo
+ *
+ * @author gjh
+ * @version 1.0
+ * @since 2022/03/18
+ */
+public class StreamDemo {
+    public static void main(String[] args) {
+        filter();
+    }
+
+    public static  void filter(){
+        List<String> list = Arrays.asList("av", "dfs", "tr");
+        List<String> a = list.stream().filter(str -> str.contains("a")).collect(Collectors.toList());
+        System.out.println(a);
+    }
+}