diff --git a/s-day07/src/com/inmind/stream07/ConcatDemo19.java b/s-day07/src/com/inmind/stream07/ConcatDemo19.java
new file mode 100644
index 0000000..610b368
--- /dev/null
+++ b/s-day07/src/com/inmind/stream07/ConcatDemo19.java
@@ -0,0 +1,18 @@
+package com.inmind.stream07;
+
+import java.util.stream.Stream;
+
+/*
+Stream流中的常用方法_concat
+static <T> Stream<T> concat(Stream<? extends T> a, Stream<? extends T> b)
+合并2个流，生成一个新的流
+ */
+public class ConcatDemo19 {
+    public static void main(String[] args) {
+        Stream<Integer> stream1 = Stream.of(1, 2, 3, 4, 5);
+        Stream<Integer> stream2 = Stream.of(6, 7, 8, 9, 10);
+        //合并2个流
+        Stream<Integer> stream = Stream.concat(stream1, stream2);
+        stream.forEach(i-> System.out.println(i));
+    }
+}