diff --git a/src/test/java/com/cst/vllm/Demo.java b/src/test/java/com/cst/vllm/Demo.java
new file mode 100644
index 0000000..367ea18
--- /dev/null
+++ b/src/test/java/com/cst/vllm/Demo.java
@@ -0,0 +1,7 @@
+package com.cst.vllm;
+
+public class Demo {
+    public static void main(String[] args) {
+        System.out.println("hello world: "+null);
+    }
+}