diff --git a/src/main/java/org/exceptions/Unknown.java b/src/main/java/org/exceptions/RuntimeExceptionDemo.java
similarity index 97%
rename from src/main/java/org/exceptions/Unknown.java
rename to src/main/java/org/exceptions/RuntimeExceptionDemo.java
index 57a0aba..96bc212 100644
--- a/src/main/java/org/exceptions/Unknown.java
+++ b/src/main/java/org/exceptions/RuntimeExceptionDemo.java
@@ -2,7 +2,7 @@ package org.exceptions;
 
 import java.util.regex.Pattern;
 
-public class Unknown {
+public class RuntimeExceptionDemo {
     public static void main(String[] args) {
 
         UserEntity user = new UserEntity("Ali", "Ahmadi", 1234567890L,