diff --git a/s-day05/src/com/inmind/thread02/Demo12.java b/s-day05/src/com/inmind/thread02/Demo12.java
new file mode 100644
index 0000000..53cf6dc
--- /dev/null
+++ b/s-day05/src/com/inmind/thread02/Demo12.java
@@ -0,0 +1,14 @@
+package com.inmind.thread02;
+//主线程（main）
+public class Demo12 {
+    public static void main(String[] args) {
+        for (int i = 0; i < 1000; i++) {
+            System.out.println("hello java");
+        }
+        System.out.println("------------------------");
+        for (int i = 0; i < 1000; i++) {
+            System.out.println("hello js");
+        }
+        System.out.println("程序结束");
+    }
+}