diff --git a/rc/main/java/Singleton.java b/rc/main/java/Singleton.java
new file mode 100644
index 0000000..9196dcd
--- /dev/null
+++ b/rc/main/java/Singleton.java
@@ -0,0 +1,16 @@
+package cn.edu.zust.dubbo;
+
+public class Singleton {
+    private int number =2025;
+    public void setNumber(int number){
+        this.number=number;
+    }
+    public int getNumber(){
+        return number;
+    }
+    private static Singleton instance =new Singleton();
+    private Singleton(){}
+    public  static  Singleton getInstance(){
+        return  instance;
+    }
+}